题目内容

— Why? Tom, your shirt is so dirty!
— Mum, I ＿＿ my storeroom downstairs。
A．cleanedB．have workedC．was cleaningD．have been cleaning
D
现在完成进行时表示从过去某时到现在一直在进行的动作。
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It seems that oil______from this pipe for some time.We’ll have to take the machine apart to put it right.
A．had leaked B．is leaking
C．leakedD．has been leaking
Jim talked for about half an hour yesterday. Never＿＿ him talk so much.
A．I heardB．did I hearC．I had heardD．had I heard
—Where do you think＿＿he＿＿the computer?
— Sorry. I have no idea.
A．has ； boughtB．／； boughtC．did ； buyD．had ； bought
— Has Jack finished his homework yet?
— I have no idea；he ＿＿it this morning.
A．was doingB．had been doingC．has doneD．did
I can guess you were in a hurry. You ＿＿ your sweater inside out.
A．had wornB．woreC．were wearingD．are wearing
My pain _____ obvious the moment I entered the office，for the first man I met asked pitifully，“Are you feeling all right？”
A．could be B．could have been C．must be D．must have been
I feel sure I _____ her before somewhere.
A．was to meet B．have met
C．had metD．would meet
---Can I help you, sir? 
---Yes. I bought this radio here yesterday, but it _____.
A．didn't workB．wouldn't workC．can't workD．doesn't work

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