| 1. 难度：中等 | |
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I had _____useful umbrella when it rained. A. a B. an C.\ D. the
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| 2. 难度：困难 | |
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—What is he going to ______ when he ______ up? —He’s going to be a doctor. A.do, grow B.does, grows C.be, grow D.be, grows
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| 3. 难度：中等 | |
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—Will you buy the white watch or the red one ? ----I’ll take_____.One is for my mother and the other is for my sister. A.both B.either C.all D.each
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| 4. 难度：简单 | |
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----How terrible the air is! Yes,if there are ___trees, there will be ___air pollution in our city. A. less more B. more less C. less less D. more more
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