He waited ________ the volcano became quiet and he was able to return two days l
题型：不详难度：来源：
He waited ________ the volcano became quiet and he was able to return two days later.| A．when | B．before | C．as | D．until |
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答案
| D |
解析
| until引导的时间状语从句。句意为“他一直等到火山平息下来,两天后他才得以重回火山上”。 |
举一反三
A warning news report from Qatar announces that a group of Islam will continue to kill Americans wherever they are ________ they leave the Arab world forever. | A．even though | B．in case | C．whenever | D．until |
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________ he studies hard, he will never pass the examination. | A．If | B．Unless | C．Even if | D．Even though |
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— May I go and play football with Dick this afternoon, Dad?
— No, you can’t go out ________ your work is being done. | A．before | B．until | C．as | D．after |
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| I had no sooner got back to the kitchen ________ the door-bell rang loud enough to wake the dead. |
She worked hard ________ everything would be ready by the time he came back. | A．since | B．so that | C．as if | D．unless |
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