Question

【题目】He could not __________ a right answer， so he felt very sad.

A. think about B. come up with

C. think over D. think to

Answer 1

【答案】B

【解析】

试题分析：句意：他不能想出一个正确的答案，所以他感到非常难过。think about考虑；come up with想出，提出；think over仔细思考，反复考虑。结合句意和语境可知选B。