问题
选择题
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
答案：C
take in(=understand)理解。参阅Ⅲ。173注释。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。