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科目： 來源：不詳 題型：單選題

By the time Jack returned home from England, his son.      from college.
A．graduatedB．has graduated
C．had beenD．had graduated

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科目： 來源：不詳 題型：單選題

Last month, the Japanese government expressed their thanks for the air they_______ from China.
A．receiveB．a(chǎn)re receivingC．have receivedD．had received

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科目： 來源：不詳 題型：單選題

—Pity you missed the lecture on nuclear pollution.
—I____ it, but I was busy preparing for a job interview.
A．a(chǎn)ttendedB．had attended
C．would attendD．would have attended

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科目： 來源：不詳 題型：單選題

Experience of this kind        in both the U.S. and Europe well before the Second World War.
A．have conductedB．have been conducted
C．had conductedD．had been conducted

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科目： 來源：不詳 題型：單選題

Tom       in the library every night over the last three months.
A．worksB．workedC．have been workingD．had been working

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科目： 來源：不詳 題型：單選題

—That must have been a long trip.
—Yeah, it        us a whole week to get there.
A．takesB．has takenC．tookD．was taking

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科目： 來源：不詳 題型：單選題

—Where are the children? The dinner’s going to be complerely ruined.
—I wish they         always late.
A．weren’tB．hadn’t beenC．wouldn’t beD．wouldn’t have been

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科目： 來源：不詳 題型：單選題

Maybe if I       sicence, and not literature then, I would be able to give you more help.
A．studiedB．would studyC．had studiedD．was studying

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科目： 來源：不詳 題型：單選題

—Bob has gone to Califonia.
—Oh, can you tell me when he        ?
A．has leftB．leftC．is leavingD．would leave

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科目： 來源：不詳 題型：單選題

When I got on the bus,I_____I had left my wallet at home.
A．was realizingB．realizedC．have realizedD．would realize

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