来自李曦的问题
Bothofmyparentsareinterestedin___stampsA.collectB.collectingC.collectedD.tocollect
Bothofmyparentsareinterestedin___stamps
A.collect
B.collecting
C.collected
D.tocollect


Bothofmyparentsareinterestedin___stampsA.collectB.collectingC.collectedD.tocollect
Bothofmyparentsareinterestedin___stamps
A.collect
B.collecting
C.collected
D.tocollect
B
固定用法;对……感兴趣beinterestedindoingsth