题目

He didn't _____ what I read because his mind was on something else. A. hold on    B. catch on    C. take in    D. get over 答案：C 解析: take in(=understand)理解。 hold on(打电话时)不要挂断；catch on明白（作不及物动词用），catch on to懂得，明白（作及物动词用）；get over克服。

查看本题答案和解析