( )你向别人询问一个问题前,你应该说:A. Excuse me. B. Thank you.
A : My son is hungry.B : ________ .
A : In which box?B : ________ .
Can I ________ ?
A : Which is for me?B: Guess. This one ________ that one ?
A: This is your lion, I think.B: ________ . It's a dog.