As a heavy smoker , he finds it hard to get rid of the habit, which has a bad _____on his health.
A．a(chǎn)ffectB．effectC．effortD．a(chǎn)ffection
B

試題分析：A .affect動詞：影響，感染，B. effect名詞：影響，效果，C. effort名詞：努力，D.affection名詞：喜愛，句意：做為煙癮很重的人，他發(fā)現(xiàn)很難戒掉這個習(xí)慣，這對他的健康有不好的影響。選B。
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