While we _________, we saw a UFO land on a street. A．were shoppingB．shoppedC．are
题型：不详难度：来源：
While we _________, we saw a UFO land on a street. | A．were shopping | B．shopped | C．are shopping | D．shop |
|
答案
| A |
解析
| 本题主要考查的是while 引导的时间状语从句，当主句为一般过去时时，从句用过去进行时，即从句的动作发生在主句的动作之中，故选答案为A |
举一反三
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