Did you have any trouble __(find)the post office.

Did you have any trouble __(find)the post office.

题目
Did you have any trouble __(find)the post office.
答案
findingDid you have any trouble finding the post office?这里其实省略了介词in应该是Did you have any trouble in finding the post office?固定搭配:have sth.in(可省略) doning sth.
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