Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, ________？
#64479
A
isn't it
B
does it
C
doesn't it
D
is it
推荐题目
---- What do you think of the lecture made yesterday?---- Excellent! _______ you missed such a wonderful lecture?
#64876
A
How is it that
B
Why it was that
C
How was it that
D
When was it that
He must have been annoyed by something yesterday, _____?
#64519
A
wasn’t he
B
hasn’t he
C
needn’t he
D
mustn’t he
You should have watered the flower earlier, ?
#65217
A
shouldn’t you
B
didn’t you
C
don’t you
D
haven’t you
---Did you use to be afraid of the dark? --- _________. And I’m still afraid of the dark now.
#59795
A
Yes,I did.
B
No, I didn’t
C
Yes,I didn’t
D
No,I did.
He must have known the truth yesterday, _________?
#64623
A
haven’t you
B
didn’t you
C
have you
D
did you