问题
选择题
While I _______ TV in the sitting room, the bell _______.
A．watches, rings
B．watched, rang
C．was watching, rang
D．watched, was ringing
答案
答案：C
while引导的时间状语从句，一般情况要用进行时态。
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While I _______ TV in the sitting room, the bell _______.
A．watches, rings
B．watched, rang
C．was watching, rang
D．watched, was ringing
答案：C
while引导的时间状语从句，一般情况要用进行时态。