题目内容
（请给出正确答案）
[主观题]
Do you know the difficulty he had （) the work？
A、on finishing
B、to finish
C、finishing
D、have finished
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A、on finishing
B、to finish
C、finishing
D、have finished
如果结果不匹配，请 联系老师 获取答案
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