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科目： 來源：不詳 題型：單選題

The past two years ________ a sharp rise in oil price，which adds to the burden of auto transportation industry.
A．witnessedB．has witnessed
C．is witnessingD．witnesses

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科目： 來源：不詳 題型：單選題

—Peter！Let's hurry.The boss is coming.
—Oh，I was afraid that we ________ her.
A．missB．had missed
C．will missD．have missed

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科目： 來源：不詳 題型：單選題

—Why do you look so puzzled?
—Oh，I ________ over a most difficult maths problem.
A．thoughtB．have thought
C．a(chǎn)m thinkingD．think

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科目： 來源：不詳 題型：單選題

I don't remember who came first，but we all________the lecture.
A．a(chǎn)ttendB．a(chǎn)ttended
C．have attendedD．a(chǎn)re attending

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科目： 來源：不詳 題型：單選題

Nowadays，more Chinese provinces________education reforms that will allow children of migrant workers to sit college entrance exams locally.
A．have announced B．a(chǎn)re announcing
C．a(chǎn)nnouncedD．will announce

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科目： 來源：不詳 題型：單選題

George once told me that he would visit our house，but，for various reasons，he________so far.
A．didn'tB．hasn't
C．hadn'tD．wouldn't

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科目： 來源：不詳 題型：單選題

(2013·高考重慶卷)—It rained cats and dogs this morning.I’ m glad we took an umbrella.
—Yeah，we would have got wet all over if we________.
A．hadn’tB．haven’t
C．didn’tD．don’t

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科目： 來源：不詳 題型：單選題

(2013·高考江蘇卷)I should not have laughed if I________ you were serious.
A．thoughtB．would think
C．had thoughtD．have thought

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科目： 來源：不詳 題型：單選題

(2013·高考新課標(biāo)全國(guó)卷Ⅰ)When I first met Bryan I didn’t like him，but I________my mind.
A．have changed　　　B．change
C．had changedD．would change

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科目： 來源：不詳 題型：單選題

(2013·高考新課標(biāo)全國(guó)卷Ⅰ)If we________now to protect the environment，we’ll live to regret it.
A．hadn’t actedB．haven’t acted
C．don’t actD．won’t act

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