给下列句子选择正确的答语

____Is he drinking water?                  A. Yes, they are.

____Can you take him to the park?           B. No, he isn't. He's eating.

____Whose book is this?                   C. He's in the kitchen.

____Are these all ours?                    D. It's Mike's.

____Where is Fido now?                   E. Of course.

下列各句中加线的成语，使用最恰当的一项是（    ）