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:

選B。本題考查學生運用省略語法的做題能力。 完整的句子為：If you aren’t (careful)，you’ll drop them. 另外，條件狀語從句用現(xiàn)在時表將來，所以排除了won’t。

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