根据所给的汉语写出单词,使句子意思完整正确。 51. Our classroom isn’t as clean as ▲ (平常) after exams. 52. It’s such a ▲ (令人愉快的) trip that I will remember it for ever. 53. The final-term exam is coming soon. The students are busy ▲ (准备)for it. 54. Amy is such a clever girl that she learned to cook by ▲ (她自己) at 8. 55. In my school, students not only work hard, but also take part in all kinds of ▲ (活动), such as dancing, drawing, reading and so on. 56. The old woman prefers ▲ (步行) to jogging. 57. Science is one of my favorite ▲ (科目). What about you?
答案:51. usual 52. pleasant 53. preparing 54. herself 55. activities 56. walking 57. subjects