题目内容
I was watching the news on TV ________ the power went off.
|
A.when |
B.as |
C.while |
D.until . |
【答案】
A
【解析】be doing sth. when 正在做某事这时……。
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题目内容
I was watching the news on TV ________ the power went off.
|
A.when |
B.as |
C.while |
D.until . |
A
【解析】be doing sth. when 正在做某事这时……。