56. I found impossible for to work out the maths problem.A. it; himB. it; heC. that; himD.

问题补充：

56. I found impossible for to work out the maths problem.

A. it; him

B. it; he

C. that; him

D. that; he

答案：

(答案→)A. it; him

B. it; he

C. that; him

D. that; he

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