问题

We must protect plants. They are friends of ______.
A:we
B:us
C:our
D:ours;
B:us
C:our
D:ours;
正确答案是:
同类题型
I __________ laughter at the sight of the funny actor.
His health requires that he ________ to bed early
It was ______ that they all went swimming in the river.
I still remember________to the Famen Temple and what I saw there.
Is there any possibility ____ the little girl can be the champion in the London Olympics? [ ]