I’m always ________ about what I say because careless remarks are likely to hurt others’ feelings.

A. enthusiastic B. curious

C. doubtful D. cautious

D

【解析】

試題分析：考查形容詞詞義辨析；A. enthusiastic熱心的，熱情的； B. curious好奇的；C. doubtful懷疑的，可疑的；D. cautious小心的，謹慎的。句意：我總是對我所說的話很謹慎，因為粗心的評述很有可能會傷害他人的情感。故選D

考點：考查形容詞詞義辨析

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