题目内容
I phoned you at six yesterday evening, ______ nobody answered.| A.because | B.or | C.but | D.so |
C解析:
略
略
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—I phoned you at 7:00 this morning. But there was no answer.
—Well, maybe I _________ morning exercises at that time.
| A.was doing | B.did | C.is doing | D.would do |