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21.Its bad/good for 对...有害处 eating more fruit is good for health. Dont read in bed. Its bad for your eyes. 22.Its important/impossible/impolite/difficult for sb. to do sth.对于某人来说做...很重要的 At school, its very important for every student to keep their own classrooms clean and tidy. Although it is raining heavily, it looks that its impossible for him not to finish the last 200 meters. 23. Its time for .../to do sth. 对于...来说做...的时间了 Its time for us to borrow books from the library. Its time for Tom to take medicine. 24. Its two meters(years) long(old)它两米长(两岁大) He is two meters tall. The river is twenty meters wide. 25. keep sb. doing sth 让某人一直做某事 The headmaster kept me waiting for two hours last time. Why do you keep laughing all the time? 26. keep/make sth. +adj. 让...一直保持... Its important for us to keep calm in danger. The movie was so sad that it made us cry. 27. like to do /like doing 喜欢做.... My younger sister likes singing and dancing very much. What kind of books does she like reading in her free time? | 
