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

问题补充：

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

A. enthusiastic

B. curious

C. doubtful

D. cautious

答案：

A. enthusiastic

B. curious

C. doubtful

(答案→)D. cautious

解析：句意为：我总是对我所说的话很谨慎，因为粗心的评述很有可能会伤害他人的情感。enthusiastic adj热心的，热情的；curious adj好奇的；doubtful adj怀疑的，可疑的；cautious adj小心的，谨慎的。故答案应为D。