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I am _____ about what I say because careless remarks are likely to hurt others' feelings.
A.enthusiastic B.concernedC.doubtfulD.cautious
D

试题分析:形容词短语辨析。Be enthusiastic about对…热情;Be concerned about关注…;Be doubtful about怀疑…;Be cautious about对…很谨慎;对于所说的话我很谨慎,因为粗心的评论很可能伤害到其他人的感情。根据句意说明D正确。
点评:每个形容词都有自己的搭配:Be enthusiastic about对…热情;Be concerned about关注…;Be doubtful about怀疑…;Be cautious about对…很谨慎;
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