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2. Be careful with such things. If you _____, you’ll drop them.

A. don’t     B. aren’t     C. won’t    D. do

B


解析:

选B。本题考查学生运用省略语法的做题能力。 完整的句子为:If you aren’t (careful),you’ll drop them. 另外,条件状语从句用现在时表将来,所以排除了won’t。

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