The task _______ by the time you come back.A．has been completedB．will have been
题型：不详难度：来源：
The task _______ by the time you come back.| A．has been completed | B．will have been completed | C．will complete | D．has completed |
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答案
| B |
解析
| 此题考查时间状语从句。by the time+一般现在时态，主句应用将来完成时态，by the time+一般过去时态，主句应用过去完成时态，题中by the time后面是一般现在时态you come back，故选B，若掌握by the time的用法，就不难了。 |
举一反三
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