Not until the teacher explained the importance of getting up early ______ we pro
题型：不详难度：来源：
Not until the teacher explained the importance of getting up early ______ we promise to come early. | A．should | B．would | C．did | D．could |
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答案
| Ｃ |
解析
| 考察倒装句。Not until放在句首时，后面的主句使用部分倒装的形式。后面主句的promise是谓语动词，所以使用助动词did.句意：直到老师届时了早起的重要性的时候，我们才允诺会早点来。 |
举一反三
At the foot of the mountains ____ a tower built in the Ming dynasty. | A．Stood | B．stands | C．standing | D．stand |
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The joy of life is a deep spring. Only when digging deep ______ clear and sweet water.| A．you can draw | B．did you draw | C．can you draw | D．you draw |
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Every one of us must know：________we live can we save the earth.| A．by changing the way only | | B．only by changing the way | | C．by only changing the way | | D．by changing only the way |
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Long long time ago, there was a mountain. At the top of the mountain___________, in which an old monk used to tell stories.| A．a temple stood | B．is there a temple | C．stood a temple | D．a temple was there |
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Only when the European countries’ financial system broke down_____ to take measures to deal with those problems.| A．did they decide | B．they decided | C．they had decided | D．had they decided |
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