题目内容
--- What do you think of the math problem ?
--- It’s very hard and nobody has _______.
A. put it out B. helped it out
C. worked it out D. solve
C
【解析】
试题分析:句意:你认为这道数学题怎样?它很难,没有人能算出。put out扑灭;help out给与帮助;work out解决;solve解决。解决数学一类的问题,常用work out,而解决困难等常用solve。所以选C。
考点:考查动词短语。
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