Question

【题目】They _______ for five hours when they ______ in New York.

A. flew…arrived B. had flown…had arrived

C. flew…had arrived D. had flown…arrived

Answer 1

【答案】D

【解析】句意：当他们到达纽约的时候，他们已经飞行了5个小时。这里是when引导的时间状语从句，主语是过去完成时，从句用一般过去时态。第一个空是一般过去时态，第二个空是过去完成时，其结构是had done的形式，短语arrive in…表示到达……。根据题意，故选D。