Do you know the trouble he had the work?A. on finishingB. to finishC. having finishingD.

问题补充：

Do you know the trouble he had the work?

A. on finishing

B. to finish

C. having finishing

D. finishing

答案：

A. on finishing

B. to finish

C. having finishing

(答案→)D. finishing

解析：考查固定句式和句子结构；固定句式:have trouble (in) doing sth做某事有困难，本题是把名词trouble提前，做先行词，后面形成了定语从句。That指代trouble做had的宾语。句意：你知道他找到工作的危险吗？故D正确。