Years ago we didn"t know this, but recent science study ________that people who
题型：不详难度：来源：
Years ago we didn"t know this, but recent science study ________that people who don"t sleep well soon get ill.| A．showed | B．will show | C．has shown | D．is showing |
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答案
| C |
解析
试题分析：考查时态，句意：多年前，我不知道这个，但是最近的研究表明睡眠不好的人很容易生病。句中的recent 可知应用现在完成时。选C。 |
举一反三
Many parents __________ challenging conversations with their children later this month to help them recover from the panic. | A．have had | B．will be having | C．have | D．will have had |
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--- Hi Mike, are you busy now?
--- Not really. I _____ my work, and I’m going to see a movie online.| A．did | B．have been doing | | C．had done | D．have done |
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---You’re trembling. What’s happened?
---- I ______ outside in the cold for over an hour waiting for a bus.| A．was standing | B．have been standing | | C．stood | D．will stand |
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It is getting colder. I hope the sudden change of climate _____ you.| A．don’t upset | B．didn’t upset | C．hasn’t upset | D．won’t upset |
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--- _____ the change of the schedule ______?
--- Oh, God! I forgot all about it. I’ll do it right now.| A．Has, been announced | B．Was, announced | | C．Has, announced | D．Had, been announced |
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