摘要：I saw Mr. Smith last Sunday. We had not seen each other b I left London. A. as B. before C. since D. till 2. I’ll be back before you c . A. will leave B. will have left C. leave D. would leave 3. The problem won’t be settled until we a a chance to discuss it thoroughly. A. have had B. will have C. will have had D. would have
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I saw Mr. Smith last Sunday. We had not seen each other ________ I left London.
A. as B. before C. since D. till
I saw Mr. Smith last Sunday. We had not seen each other ________ I left London.
A. as B. before C. since D. till