Beijing ____ its best air quality in the first six months of last year.

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• 1— How did you play in the match? — Well, our team was ahead by 2 to 0 during the first half, but we _____ in the last ten minutes.

  A.had lost

  B.have lost

  C.were losing

  D.lost

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• 2Edward, you play so well. But I _____ you played the piano.

  A.didn't know

  B.hadn't known

  C.don't know

  D.haven't known

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• 3— If the traffic hadn't been so heavy, I could have been back by 6 o'clock. — What a pity! Tina _____ here to see you.

  A.is

  B.was

  C.would be

  D.has been

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• 4There they met two Indian monks who were Buddhist masters and ______ as educators without salary.

  A.were working

  B.worked

  C.have work

  D.had worked

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• 5I wasn't sure if he was really interested or if he _____ polite.

  A.was just being

  B.will just be

  C.had just been

  D.would just be

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• 6When the old man ____ to walk back to his house, the sun ____ itself behind the mountain.

  A.started; had already hidden

  B.had started; had already hidden

  C.had started; was hiding

  D.was starting; hid

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• 7— Hi, Michelle, I can't find my e-dictionary. — Sorry, I _____ it. I guess I put it on the top shelf with my things.

  A.had used

  B.used

  C.was using

  D.am using

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• 8一 Your colleague's spoken English is beautiful, Lily. 一 It's no wonder. She _____ in the USA for a year as a visiting professor.

  A.worked

  B.has worked

  C.had worked

  D.has been working

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• 9— We thought he would have won the game.— What a pity! He _____ too nervous when playing.

  A.had been

  B.has been

  C.was

  D.would have been

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• 10When I got on the bus, I _____ I had left my wallet at home.

  A.was realizing

  B.realized

  C.have realized

  D.would realize

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