Chinese scientists recently have produced two monkeys with the same gene, Zhong Zhong and Hua Hua, using the same technique that gave us Dolly the sheep. These monkeys are not actually the first primates(灵长类)to be cloned. Another one named Tetra was produced in the late 1990s by embryo(胚胎)splitting, the division of an early-stage embryo into two or four separate cells to make clones. By contrast, they were each made by replacing an egg cell nucleus(原子核)with DNA from a differentiated body cell. This Dolly method, known as somatic cell nuclear transfer(SCNT), can create more clones and allows researchers greater control over the edits they make to the DNA.

    Success came from adopting several new techniques. These included a new type of microscopy to better view the cells during handling or using several materials that encourage cell reprogramming, which hadn't been tried before on primates. Still, the research process proved difficult, and many attempts by the team failed. Just two healthy baby monkeys born from more than 60 tested mothers. This leads to many researchers' pouring water on the idea that the team's results bring scientists closer to cloning humans. They thought this work is not a stepping stone to establishing methods for obtaining live born human clones. Instead, this clearly remains a very foolish thing to attempt, it would be far too inefficient, far too unsafe, and it is also pointless.

    But the scientists involved emphasize that this is not their goal. There is now no barrier for cloning primate species, thus cloning humans is closer to reality. However, their research purpose is entirely for producing non-human primate models for human diseases; they absolutely have no intention, and society will not permit this work to be extended to humans. Despite limitations, they treat this breakthrough a novel model system for scientists studying human biology and disease.

– But I still don't think ________ could pass it.

Pam Bales, an experienced hiker, stepped onto snow-covered Jewell Trail. The hike up the lower part of Jewell was1. But less than an hour later，the weather was showing its teeth. Bales began to2 calling it a day. Then she noticed something: a single set of 3 in the snow ahead of her. She'd been4unclear tracks all day and hadn't given them much5, because so many people climb Jewell Trail. But these, as a volunteer of the Valley Search and Rescue Team, she6, had been made by a pair of sneakers, which was surely not for this kind of trail. Strong wind screamed， and7was just hours away. 8Bales continued to follow the tracks, she'd add9to the journey. But the tracks ahead meant someone might be 10 She could not let this go. She silently scolded the absent hiker for11 normal safety rules and struggled to walk carefully in the direction of the tracks.

After about tracks to 30 yards, she rounded a corner and saw a man sitting motionless. He wore tennis sneakers and a light jacket. She checked him for any sign of 12. There was none. Bales had been trained in search and rescue and knew that he was hypothermic (体温过低的) and would13 soon if he didn't get out of there. The man said he had lost his way and was extremely14. Bales brought a pair of soft-shell pants, a winter hat, and a jacket from her pack. She helped the man 15the warm， dry layers onto his body and offered him some hot cocoa. 16he stood. She offered continuous encouragement—" Keep going! You're doing great." Just before 6 p. m. , they arrived at the trailhead very17. Her climb up to the spot where she18the man had taken about four hours. Two hours had passed since then.

A week later, the president of Bales' rescue group received a letter in the mail. It read: " On Sunday October 17, 1 went up my trail, Jewell. Weather was to be bad. But without thinking too much I was dressed to go quickly. Next thing I knew this lady was talking to me, changing my clothes, making me warmer. She just kept19me. Finally, I learned her name was Pam. The entire time she treated me with compassion (同情心), confidence, and one hundred percent commitment... "

In the nine years since she saved John, Bales has become something of a hiking legend (传奇人物). It's a( n)20she never sought or wanted, but one she certainly has earned.

BRAD GARRETT'S COMEDY CLUB

Category: Comedy

Best known for his role on the Emmy award-winning sitcom Everybody Loves Raymond, Brad Garrett returns to his Vegas roots with his comedy club at the MGM Grand. It is a good place to check out when you need a break from work.

Prices from: $56.40 and up

Age restriction: Must be 21 years of age or older

Show Length: 115 minutes

MAC KING COMEDY MAGIC SHOW

Category: Comedy, Magic

Mac King Comedy Magic Show is different every afternoon, with lots of audience participation. He is willing to make fun of himself instead of his guests in order to make everyone feel welcome and entertained. The afternoon is kid-friendly from start to finish. Still, whether you're eight or 80, you won't be able to figure out King's secrets.

Prices from: $40.90 and up

Age restriction: No age restriction

Show Length: 90 minutes

THE MENTALIST, GERRY MCCAMBRIDGE

Category: Comedy, Magic

Using his skills as a “mentalist”, Gerry McCambridge shocks the crowds as he uses his abilities to predict just what audience members will do next. Anyone who has seen the show has walked away in disbelief, amazed by his unusual power.

Prices from: $34.99  and up

Age restriction: Under 13 will not be admitted into the theater

Show Length: 75 minutes

ROCK OF AGES

Category: Plays & Musicals

The cheerful Rock of Ages brings audiences back to the times of big hair and even bigger bands with 28 popular rock songs from the 80s including “Every Rose Has Its Thorn,” “I Wanna Know What Love Is,” “Here I Go Again,” and more.

Rock of Ages has been nominated for five Tony Awards including Best Musical and Best Direction of a Musical. It also received a Drama League nomination for Distinguished Production for a Musical.

Prices from: $74.00 and up

Age restriction: Must be 15 years of age or older

Show Length: 125 minutes

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

The China National Space Administration published on Thursday three pictures  (take)recently by its Zhurong Mars rover (探测器),  showed the parachute (降落伞)and bowl-shaped back shell used in the rover's landing.

The pictures (shoot) by Zhurong's camera on Monday as the rover was traveling southward for its scientific (explore).

As of Thursday afternoon, Zhurong, named the Chinese god of fire in ancient mythology, had operated 60 days on Mars and traveled 450 meters (survey)the barren planet. Meanwhile, the mission's orbiter has continued traveling around the Red Planet.

The 240-kilogram Zhurong is tasked with surveying Mars' landforms, geological structures, soil characteristics, potential locations of water and ice, and other physical (property).

 1.85-meter-high rover is the core component of the Tianwen 1 mission, the country's first interplanetary adventure. Tianwen 1 was  (success)launched by a Long March 5 heavy-lift carrier rocket on July 23,2020 from the Wenchang Space Launch Center,  (begin)the nation's first mission to another planet.

    Winters are always long and cold in North China. The winter of 2008 was especially tough in one southwestern city,1it became extremely cold and it was also a difficult time for me. What was worse, a(n)2injury happened to me and it might keep me in bed for several months, "Just in time for the Spring Festival, " my mother said to me, sighing. But how could I feel the3when the snow was so heavy and I had months of physical 4ahead?

    One day I was doing my housework5there was a tap against the window from a branch of the troublesome fruit tree. On hearing this, with my eyes closed, slowly, I began to recall the fall of 1995 when somebody placed a pipe from my pump next to the6.The earth was so wet that it 7immediately with most its bare roots upward. Seeing this, my mother8to pull it out, but I refused. "How hard it's trying!" I said9the direction of its strong holding of the earth. "It is10 of a chance to survive." With tools, we 11dry soil around the tree and put up some supports into the ground, making it12 upright.

    Several months had passed before I could be 13of it. Surprisingly, when spring returned, my "rescue14"had grown some leaves and many15. In 2009 that little rescue stick had grown into a towering tree. What an unbelievable miracle of life!

    The day before the Spring Festival, the 16 at the window was continuing, the more fierce wind, the 17sound, as if to remind me to look up and appreciate its powerful life.

    That night I slept peacefully having a(n)18.In the dream some flowers were coming out19. The next morning I stood against the window.20the window was the tree bursting with life. Anyway, I had a wonderful Spring Festival that year.

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

Dear Jerry,

    Glad to learn that you had interest in Chinese food. Here I'd like to tell you something about them. There is a wide variety of food in China. For example, Shanghai food, a little bit sweet, differ from Sichuan food which is rather hot. However, every kind of Chinese food is worth try because each has rich and balance nutrition. Different Chinese restaurants usual serve different dishes. I guess the Cantonese cuisine (粤菜), it is a bit light, may suit you. I hope you can come China and experience the Chinese food culture.

Li Hua

Target Car Seat Trade-in Event

Frequently Asked Questions:

·What is the car seat trade-in program?

Guests who trade in their old car seats will receive a 20 percent off coupon toward a new car seat.

·What type of car seat qualifies for a trade-in?

Target will accept and recycle all types of car seats, including: baby car seats, car seat bases, as well as car seats that are damaged. Guests will receive a 20 percent off coupon for trading in any one of these items.

·Where do I bring my old car seat to trade in?

Car seats can be traded in at any of the Target stores. Target will have drop-off boxes for guests' unwanted car seats located near Guest Services.

·How do I redeem(兑现) the coupon offer?

Coupons can be applied to both in-store and online purchases and are valid(有效的) until May 31.

·What does Target do with the car seats that are traded in?

Materials from the old car seats will be recycled by Target's partner, Waste Management, to create new products such as plastic plates, plastic buckets and construction materials such as steel beams and carpet padding.

·Is this the first time Target has had car seat trade-in program?

Target introduced its first car seat trade-in program in April 2016. Since the program launched, more than 789, 000 car seats, or 11. 98 million pounds of car seats, have been recycled.