Question

－I think students should be allowed _______ homework with friends.
－I disagree. They talk instead of ________ homework.

A．do, doing

B．to do, to do

C．to do, doing

D．doing, to do

Answer 1

C

be allowed to do表示被允许做某事，instead of中的of是介词，表示代替的意思，后跟动词要用doing，故本题选C。