问题

It’s hard-working ____ him to spend three hours ____the library on Sunday.
A:for; in
B:for; on
C:of; in
D:of; on
B:for; on
C:of; in
D:of; on
正确答案是:
同类题型
Yesterday on the way home my father found a new-born baby_____ by its mother, struggling to survive.
He doesn’t think the question of ________ they are boys or girls is important.[ ]
________ fine day! Let’s go hiking together. —Good idea!
Would you mind _______here—I’m sorry about that. I’ll go somewhere else.