— Mom, my classmates are playing outside. Can I join them?— Not until your homew
题型：不详难度：来源：
— Mom, my classmates are playing outside. Can I join them?
— Not until your homework .| A．finishes | B．is finished | C．finished | D．was finished |
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答案
| B |
解析
试题分析：句意：妈妈，我的同学在外面玩，我可以加入他们吗？直到你的作业完成了你才能去。动作的承受者作主语，用被动语态。其结构是，主语+be+done.在时间状语从句中主句用将来时态从句用一般现在时。根据句意，故选B。 |
举一反三
— It’s raining! When did it start?
— I don’t know exactly. In fact, it _________ all this afternoon.| A．lasts | B．lasted | C．has lasted | D．will last |
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—It’s said the Nanjing Airport light rail_________ into service in two months.
— That’s great! It will be fast to go to the airport.| A．puts | B．will put | C．is put | D．will be put |
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Trees and flowers ________every year to make our country more beautiful. | A．is planted | B．was planted | C．are planted | D．were planted |
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I first met Lisa three years ago. She ________ at a radio shop at the time. | A．worked | B．was working | C．has worked | D．has been working |
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It’s reported that a light rail from Nanjing to Lishui by the end of 2015.| A．has been completed | B．is completed | | C．was completed | D．will be completed |
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