—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
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—Could you look after my pet dog for me while we are away? —________.
#24652
A
No,thanks
B
With pleasure
C
It’s my pleasure
D
I’m sure you will
--- I heard that you lost your wallet and your i-Phone. --- Oh,__________ !
#996
A
never mind
B
that’s all right
C
just my luck
D
thank you