根据对话内容，在每个标有题号的空白处填入一个适当的句子，使对话完整，合乎情景。
（A New English．Chinese Dictionary is on sale in the Foreign Language Book Store．Dick is too busy to go there．He asks John to get one for him．）
—Hello! May I speak to John，please?
—This is John speaking． 1
—It's Dick．
—Hi, Dick．Where are you?
— I'm at home．
— 2
— I'm looking after my mother．
— 3
—She is ill． She has caught a bad cold．
— 4 Can I help you?
—Yes, thank you． I hear a New English-Chinese Dictionary is on sale at the Foreign Language
Book Store． Will you please go there and get one for me?
— 5 I'll go right now．
— Thank you very much．
—You're welcome．
1．Who's that／this?
2．What are you doing（now）?
3．What's wrong／the matter（with her）?
4．I'm sorry to hear that．／Sorry to hear that．／That's too bad．
5．I'm glad to．／Certainly．／Sure．／Of course．／No problem．／Yes．