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19.(  ) English is interesting, _____ I didn’t like it at first.

A. and         B. so         C. but            D. or

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18.(  ) The dress fits me well,      I don’t want to buy it because it’s too expensive.

     A. so               B. and              C. or               D. but

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17.(  )Uncle Wang gave all his savings to the Hope School    he himself was not rich.

     A.because           B.as if              C.though            D.or

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16.(  )I arrived at the airport     the plane had taken off.

      A.after           B.while           C.when           D.beflore

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15.(  )一Be careful,     you will make mistakes in your exams.

      --I know that,Mum.One can never be too careful.

     A.and           B.or             C.nor             D.but

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14.(  ) Study hard,      you'll fall behind the others.

A. and            B. but                 C. or              D. though

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13.(  ) – How long have you known the doctor ?–      he helped me three years ago.

A. When           B. Before            C. Because             D. Since

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12.(  ) Come      see my family.   

A. and            B. or              C. but                 D.until

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11.(  ) When someone is ill, he ____________ she should try to smile at life.

     A. and              B. but              C. or               D. so

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10.(  ) -Look! Here comes our school bus.

    -No hurry. Don’t get on it ______it has stopped.

   A. until             B. after             C. since             D. when

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