问题

It’s hard to keep the house _____ with three kids.
A:cleaning
B:to clean
C:cleaned
D:clean
B:to clean
C:cleaned
D:clean
正确答案是:
同类题型
That is ________ interesting work.
_____ can I get to Beijing University if I take this bus? —You may get there in half an hour. [ ]
Humans can’t live _______ air.—I agree with you.[ ]
____________ people went to the concert which was held in People’s Square the night of May Day.
I like musicians can play different kinds of music. How about you?—Oh, I like all musicians.