We all know laws to discourage the use of plastic bags _______ in many parts of the world.

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• 1He seemed as if he ______ his homework when his mother came in.

  A.did

  B.is to be doing

  C.were doing

  D.be doing

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• 2—You were out when I dropped in at your house. —Oh,I ________for a friend from England at the airport.

  A.was waiting

  B.had waited

  C.am waiting

  D.have waited

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• 3Oh, it's you! I didn't know you ______ here!

  A.am

  B.were

  C.have been

  D.will be

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• 4If the weather had been better, we could have had a picnic. But it _______ all day.

  A.rained

  B.rains

  C.has rained

  D.is raining

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• 5Cathy is taking notes of the grammatical rules in class at Sunshine School,where she_______English for a year.

  A.studies

  B.studied

  C.is studying

  D.has been studying

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• 6My father promised that he ______ me a ten-speed bicycle as a present.

  A.bought for

  B.would buy

  C.had bought

  D.has bought

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