(2013·河南郑州一模)—Hey, you haven't been acting like yourself. Everything OK?—________.
#943
A
Sure, it is      
B
I'm fine, thanks
C
That's good
D
It's a pleasure
推荐题目
—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!
—What sign is often found in the library?—_______ .
#21990
A
NO PHOTOS
B
THIS SIDE UP
C
KEEP QUIET
D
NOT AT ALL
—________ ! Somebody has left the lab door open.—Don’t look at me.
#604
A
Dear me
B
Hi, there
C
Thank goodness
D
Come on