The laboratory was well ______ for atomic research.

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• 1Alexander Fleming discovered penicillin in 1928．Otherwise, health care ________ as difficult as ever．

  A.would have been remained

  B.would be remained

  C.would have remained

  D.would remain

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• 2The red light above the elevator______ that he was at the tenth floor then.

  A.suggested

  B.symbolized

  C.observed

  D.indicated

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• 3--- I came all the way to inform you of the time and place of the meeting. --- You could have ________ yourself the trouble by calling me

  A.shared

  B.spared

  C.cost

  D.removed

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• 4Diets are most effective when _____ with exercise.

  A.combined

  B.converted

  C.contained

  D.claimed

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• 5A pilot climbed into the jet and off he ______, leaving the ground far behind.

  A.went

  B.drove

  C.flew

  D.took

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• 6He was walking in the street in the darkness when he heard someone ________ out a ________ scream．

  A.let; frightening

  B.let; frightened

  C.to let; frightening

  D.to let; frightened

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• 7Jenny was looking for a seat when, luckily, a man ________ and left．

  A.took up

  B.got up

  C.shut up

  D.set up

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• 8The old man put his oars(船桨)in the water and ________ the smooth surface of the lake．

  A.disturbed

  B.interrupted

  C.stopped

  D.made

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• 9While writing a letter, ________．

  A.The doorbell rang

  B.The doorbell rings

  C.I heard the doorbell ring

  D.I heard the doorbell rings

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• 10The concert by Lang Lang was so well ______ that all the tickets had been sold out on the first three days last month.

  A.received

  B.recognized

  C.admitted

  D.taken

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