He was so busy that _____ I could say hello to him he had rushed out of the room. |
A. when B. before C. since D. until |
科目:高中英語 來源:0123 月考題 題型:單選題
科目:高中英語 來源: 題型:
He was so busy that _____ I could say hello to him he had rushed out of the room.
A.when B.before C.since D.until
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