问题

She said she had some trouble _________ yesterday’s homework.
A:on
B:at
C:of
D:With;
B:at
C:of
D:With;
正确答案是:
同类题型
Are those your good friends—– No, ___________________.
Some parts of the water are very shallow. But in some places it is very very___________.
turned down his invitation to dinner as I didn’t want to ______ on him.
Is your father or mother a teachers— . My father is a doctor and my mother is an office worker.