问题补充:
I am about what I say because careless remarks are likely to hurt others feelings.
A. enthusiastic
B. concerned
C. doubtful
D. cautious
答案:
A. enthusiastic
B. concerned
C. doubtful
(答案→)D. cautious
解析: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。