Mr. and Mrs. Black ______ back _________.A．hasn’t come, yetB．haven’t come , yetC
题型：不详难度：来源：
Mr. and Mrs. Black ______ back _________.| A．hasn’t come, yet | | B．haven’t come , yet | | C．haven’t come， already | | D．hasn’t come , already |
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答案
| B |
解析
| Mr and Mrs Blacks构成复数概念，故应用haven’t；在完成时的否定中用yet，表示“还没、尚未”，already 用在肯定句中，表示已经。 |
举一反三
------- _______ you _______ the book ______ to the library yet.
------ Yes. I have.| A．Have ，returned，/ | | B．Have， returned， back | | C．Did return ，/ | | D．Did， return，back |
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There ______ great changes in our hometown in the past fifteen years.| A．has been | B．have been | C．was | D．were |
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---I called you yesterday evening, but there was no answer.
----- Oh, I’m sorry. I _____ dinner at a restaurant at that time.| A．have | B．had | C．was having | D．have had |
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What_____just now?| A．did he happen | B．did happen to him | | C．happen to him | D．happened to him |
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I hope you _________ to my birthday party this evening.| A．to come | B．comes | C．coming | D．will come |
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