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科目： 來源：不詳 題型：單選題

Don’t call me at 9:00 o’clock tomorrow morning ,when I          a lecture at Harvard.
A．giveB．a(chǎn)m givingC．will be givingD．a(chǎn)m going to give

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科目： 來源：不詳 題型：單選題

What shall human beings do if oil        sometime in the future?
A．will run outB．runs out of C．runs outD．will be run out

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科目： 來源：不詳 題型：單選題

--The window is dirty.
----I know. It ______ for weeks.
A．hasn’t cleanedB．didn’t clean
C．wasn’t cleanedD．hasn’t been cleaned

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科目： 來源：不詳 題型：單選題

---- The battery in my cell phone is running low.
---- I _____ that last night before we went to bed.
A．was noticingB．have noticedC．had noticedD．would notice

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科目： 來源：不詳 題型：單選題

----- You seem in low spirits. Anything wrong?
----- I ______ in the important exam. I let my parents down.
A．failB．failedC．has failedD．had failed

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科目： 來源：不詳 題型：單選題

——Did you find the missing couple in the mountain yesterday?
——No, but we _____ to get in touch with them ever since.
A．have triedB．have been tryingC．had triedD．had been trying

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科目： 來源：不詳 題型：單選題

My sister has never played tennis before. This is the first time she __________ to play.
A．is tryingB．was tryingC．has triedD．had tried

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科目： 來源：不詳 題型：單選題

Mr. Smith __________ to have a talk with you. He will be here in a minute.
A．comesB．cameC．has comeD．is coming

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科目： 來源：不詳 題型：單選題

Since the end of the war, many of the priceless antiques ______ to their rightful owners．
A．have returnedB．had returned
C．had been returnedD．have been returned

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科目： 來源：不詳 題型：單選題

I'm sorry you ______ so long, but it' ll still be some time before Jim gets back．
A．waitB．waitedC．had waitedD．have been waiting

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