The smog arrived in the Yangtze River Delta region on Nov．30，_________the air quality in 1 2 cities out of 25 was rated as severely polluted by Dec．1．
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Miss Li always tries her best to create an atmosphere in class ______ can help her students practice their speaking skills.
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At the party，John made up a joke，________ people burst out laughing.
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He got himself into a difficult situation ________he must make a final decision all by himself.
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When I am down, my parents will do what every parent will do, _______ is to hug me tighter and tell me I am the best.
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The movie Gravity won seven awards at the Oscar night, _____ was beyond the director’s wildest dream.
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D
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