题目

阅读理解 Have you ever dream ed of traveling in space? To travel in space, we first have to work out where our food will come from. Today's space travellers don't go to the Moon or Mars. They go to the International Space Station (ISS). There, the spacemen live for weeks to months. If you visited the ISS years ago, nearly every kind of food you ate would have come from the Earth. In 2014,scientists sent the ISS a space garden with some vegetable seeds（种子）. With water and some light, the vegetables in the garden grew. Those were the first foods being grown on the ISS. But the spacemen couldn't eat them and had to send them back to the Earth. The next year, after scientists made sure they were safe, the spacemen grew a second crop. This time the vegetables were ready for the spacemen to eat. Gardening is different in space than it is on Earth. Without gravity, plants don't know which way is up. But they learn how to grow. They send their leaves in the direction of light and their roots into the soil. The spacemen also have grown vegetables as well as flowers. It's important to know a plant can flower in space, because flowering is part of how some plants make fruit. While the space garden is small for now, hopefully it could one day help provide people with food on long﹣time space trips. （1） Years ago, where did most of the food on the ISS come from? A . The Mars. B . The Earth. C . The Moon. D . The space garden. （2） Why didn't the spacemen eat the first vegetables from the space garden? A . The vegetables didn't taste good. B . The spacemen didn't like vegetables. C . The vegetables might not be safe to eat. D . The scientists wanted to eat the vegetables first. （3） What does the underlined word "them" in paragraph 4 refer to? A . The spacemen. B . The scientists. C . The vegetables. D . The water and light. （4） How do the plants in the space garden grow without gravity? A . They stop growing. B . They never grow up. C . They grow in the direction of light. D . They grow in the direction of the Earth. （5） The passage is mainly about     . A . a dream to travel in space B . plants in the space garden C . a trip to the Moon and Mars D . vegetable seeds from the Earth 答案： B C C C B

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