--- Perhaps John’s not in. --- . Look, the light is on. A. Yes, he can be at home. B. No, he couldn’t go out C. Yes, he must be at home D. No, he needn’t go out 题目和参考答案——青夏教育精英家教网—

题目内容

--- Perhaps John’s not in. --- _______. Look, the light is on.

A. Yes, he can be at home. B. No, he couldn’t go out

C. Yes, he must be at home D. No, he needn’t go out

解析:

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完形填空

　　Clean air 1 important 2 health. If there are impurities (杂质) in the 3 , 4 may 5 by our bodies and make us 6 . We need clean air, but 7 , air pollution 8 generally 9 , especially 10 cities.