The guards (leave) ______ the building by the time the alarm sounded.

admin2014-10-09 37

问题 The guards (leave) ______ the building by the time the alarm sounded.

选项

答案had left

解析本题考查动词时态。状语by the time the alarm sounded “警铃响之前”通常表示主句的动作发生在时间状语之前，所以需要使用过去完成时had left。

转载请注明原文地址:https://www.kaotiyun.com/show/CdYK777K

大学英语三级A级

相关试题推荐

随机试题

最新回复(0)