We cannot figure out ____quite a number of insects, birds, and animals are dying out.
#74315
A
that
B
as
C
why
D
when
推荐题目
I’m sorry you’ve been waiting so long, but it’ll still be some time ____ Brian get back.
#74433
A
before
B
since
C
till
D
after
Having checked the doors were closed,and_______all the lights were off,the boy opened the door to his bedroom.
#71785
A
why
B
that
C
when
D
where
There is no doubt, in my opinion,_______ matters is not the speed, but the quality of the product.
#72629
A
what what
B
that that
C
that if
D
that what
It was quite a serious mistake, ____caused by carelessness.
#73080
A
which I think was
B
I think which was
C
which I think it was
D
I think which it was