题目内容

5. Some people waste too much water. They don't believe that it can  some day.

   A. keep out   B. run out

   C.be run out   D. run out of

5. B

5. B短语run out意为“用完,耗尽”,无被动语态形式.keep out

“阻止……进人”,run out of “从……中跑出来;用完 ”。

根据句意选B.

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