_____ you call me to say you' re not coming, I'll see you ..

_____ you call me to say you' re not coming, I'll see you at the theatre.[ ]A.ThoughB.Whether C.UntilD.Unless

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The girl had hardly rung the bell ___ the door was opened su..

The girl had hardly rung the bell ___ the door was opened suddenly, and out rushed her friend. [ ]A. before B. when C. untilD. since

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We must take measures to stop various kinds of pollution ___..

We must take measures to stop various kinds of pollution ______ the environment gets worse. [ ]A. unlessB. untilC. beforeD. when

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— Can you tell me how to learn English well? — Do more spea..

— Can you tell me how to learn English well? — Do more speaking, I think, ______ you will not be good at spoken English. [ ]A. then B. andC. or D. until

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Don't promise anything ________ you are one hundred percent..

Don't promise anything ________ you are one hundred percent sure.[ ]A.whetherB.afterC.howD.unless

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