—The problem isn't difficult for the children to work out, is it? —_____ . Perhaps they should have been given a more difficult one. 
#3913
A
Yes, it is
B
Yes, it isn't
C
No, it is
D
No, it isn't
推荐题目
—John, what about going for a bicycle ride tomorrow?—______. I am looking forward to it.
#2989
A
Up to you.
B
That’s all right
C
No kidding
D
Sounds fantastic
——Our teacher blamed us for playing basketball at noon.——. It was time for rest. 
#1256
A
Never mind
B
It didn’t make sense
C
I wouldn’t say no
D
You weren’t supposed to do that
.—____—Sorry, I don’t know.
#3228
A
Have you seen Mr.Smith?
B
Where has Mr.Smith gone?
C
How about Mr.Smith?
D
Hello, Mr.Smith.