Professor James will give us a lecture on the Western culture, but when and wher
题型：不详难度：来源：
Professor James will give us a lecture on the Western culture, but when and where _______ yet.| A．hasn’t been decided | B．haven’t decided | C．isn’t being decided | D．aren’t decided |
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答案
| A |
解析
| 考查时态及主谓一致。主语when and where作主语，谓语动词用单数，根据yet可知为现在完成时，选A。 |
举一反三
-- How can I apply for an online course?
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When I was at school, I _____ up very late, reading storybooks.| A．used to stay | B．was used to stay | | C．used to staying | D．am used to staying |
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—The window is dirty.
—I know. It ______ for weeks.| A．hasn’t cleaned | B．didn’t clean | | C．wasn’t cleaned | D．hasn’t been cleaned |
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If it ______tomorrow, we’d stay at home.| A．had rained | B．is raining | C．will rain | D．should rain |
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He _______ a sense of humor. This is why I don’t like being friends with him.| A．is lack of | B．is lacking in | C．lacks of | D．is lacking of |
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