I really don't know how to ________ the naughty boy．

1. A.
   do with
2. B.
   deal with
3. C.
   treat with
4. D.
   play

—I really don't know how to express my thankfulness to you .

—________.

[　　]

A．Thank you for what you've said

B．It was the least I could do

C．Never mind. I'll try it again

D．It is easy for me to do so

—I really don't know how to thank you.

—________.

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