题目内容
15.-It's too late.I have to go now.-Oh,it's raining outside.Don't leave _______it stops.( )
| A. | since | B. | until | C. | while |
分析 --太晚了,现在我必须得走了.--哦,外面正下着雨.在雨停之前,不要离开.
解答 答案:B.since意思是"自从…以来"引导时间状语从句;until意思是"到…为止,在…以前"常和not连用,构成短语"not…until…"意思是"直到…才";while意思是"当…的时候"引导时间状语从句.根据"it's raining outside"以及"Don't leave____it stops"可知在雨停之前不要走,雨停了之后再走,结合给出三个选项,所以要用until,构成短语"not…until…"故填until.
点评 首先要掌握这些从属连词的用法以及搭配,然后结合具体的语句,就可以做出正确选择.
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