题目内容
The meeting was expected to start at 9 o'clock but the manager didn't turn up ______ twenty minutes later.?
| A.before | B.until | C.after | D.since |
B
本句含到了时间状语从句,也可以看成是not…until…结构,意为“直到…才…”。句意为“直到20分钟后经理才出现”。
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