题目内容
【题目】I find difficult us to work out the math problems.
A. its; of B. its; for
C. it's; of D. it; for
【答案】D
【解析】句意：我认为我们很难做出那些数学难题。根据句型find it difficult for sb to do sth“认为某人做某事是很难的”，it是形式主语，to do sth是真正主语，故选D。
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【题目】I find difficult us to work out the math problems.
A. its; of B. its; for
C. it's; of D. it; for
【答案】D
【解析】句意：我认为我们很难做出那些数学难题。根据句型find it difficult for sb to do sth“认为某人做某事是很难的”，it是形式主语，to do sth是真正主语，故选D。