用适当的短语、句子补全对话。

A: Hi, Mike! Could you please play pingpong with me?

B:     1   .

A: Why?

B: I have to stay at home    2    my granny.

A:     3   ?

B: She said she had a cold.

A:     4   . Did she go to see doctor?

B: Yes, I took her to the hospital this morning.

A:     5   ?

B: He said there was nothing serious with my granny, but she has to be in bed for some time.

A: Are you coming later?

B: I'll if I can. I have to wait until my mother comes back.

A: OK. But now I have to ask Li Hua instead.

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