—Can you work out this math problem? —Yes. ______ 
#21495
A
It’s a piece of cake.
B
Do please.
C
It’s too hard.
D
Well done!
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--- Hi, Li Hua, Liu Ying has come back from abroad. Shall we have a get-together?--- _____.
#3544
A
It’s my pleasure
B
Great idea
C
That’s quite all right
D
It’s very kind of you.
— Are you content with her lecture?— Nowhere near that. It         .
#1947
A
may have been good
B
couldn’t have been worse
C
can’t be better
D
must be better