Do you know the difficulty he had _______the work?A．on finishingB．to finishC．fin_刷题宝

题干

Do you know the difficulty he had _______the work?

A．on finishing

B．to finish

C．finishing

D．finished

上一题下一题 0.85难度单项选择更新时间:2010-07-03 10:03:49

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