Question

—How do you improve your listening skill, Mary?
—I often do it _________ tapes and English radios.

A．by hearing

B．in listening to

C．by listening to

D．for listening

Answer 1

C

考查固定結構。By doing sth通過某種方式或手段。Listen是不及物動詞，后跟賓語是要和to連用。所以選C。