问题
选择题
The truth, Sir, is that the old man____ across the street when my car hit him.
A．was to walk
B．had been walking
C．walked
D．was walking
答案
答案：D
. 该题考查时态。表语从句中的主句用进行时态，从句由when引导表“突然发生意料不到的变化”。
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