Last night, before the exam, I went over the lessons_______I couldn’t keep my ey
题型：不详难度：来源：
Last night, before the exam, I went over the lessons_______I couldn’t keep my eyes open to stay awake any longer．| A．before | B．until | C．unless | D．when |
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答案
| B |
解析
| 考查状语从句。语境表示“直到我再也难以支撑的时候”，用until引导时间状语从句表示“直到……的时候”。 |
举一反三
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