Question

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

Answer 1

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。