问题

I had the impression ________ she chose her words carefully
A:which
B:what
C:that
D:whether
B:what
C:that
D:whether
正确答案是:
同类题型
_______ carefully! Someone is singing next door.— But I can’t _______ anything.
The drive wanted to park his car near the roadside butwas asked by the police ________
cident caused some _____ to my car, but it’s nothingserious
eally very dangerous. One more step, _____thebaby will fall into the well.