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【题目】The math problem is really difficult for us_________.

A. to work it out B. to work out

C. to work out it D. working it out

【答案】B

【解析】

试题分析:句意为:这道数学题对我们来说确实难以解答出来。通常,由“动词+介词”构成的短语接宾语时,如果宾语是代词,代词应置于动词与介词中间。根据语境,这里由“动词+介词”构成的短语不需再接宾语,否则就与前面的“the math problem”重复了。此外,这里应用动词不定式作后置定语。故应选B。

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