根据提示写一封60~80字的信。

Tom 邀请Li Ping 参加他这周日的生日宴会，但Li Ping的父母出差要到下个月回来，奶奶又卧病在床，需要人照顾。再说英语考试即将来临，因此，无法前去参加生日宴会。Li Ping感到很抱歉，只好写信辞谢。

Dear Tom,

Thank you very much for inviting me to your birthday party. I'd love to go, but I can't.

My parents…

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Complete the conversation. Use can ,can't have to let's, must or why don't 　

Tony: 　1　 　we go to the game on Saturday?

Daisy: I'm sorry. I 　2　 . I'm going to meet my sister.

Tony: 　3___ you bring your sister out with you?

Daisy: Thanks, but we can't. We 　4　 　buy a gift for my Mom's birthday.

Tony: And after that?

Daisy: Well, I 　5　 　make cookies for the party.

Tony: 　6　 　we go out in the evening?

Daisy: I'd love to. But I 　7　 　pick up my cousins at the station.

Tony: How about Sunday?

Daisy: Sorry. I 　8　 　look after my little brother.

10.-My mother is ill. I have to take care of her at home.

-____________.

A. Thank you　　　 B. Oh, I don't know　　　　　　 C. I'm sorry to hear that

9.-I'm sorry I am late.

-____________.

A. Don't sat that　　 B. You're welcome　　　　　　 C. It doesn't matter

8.My party is ____________ Friday night.

A. in　　　　　　　 B. on　　　　　　　　　　　 C. at

7.-Can you speak French?

-____________.

A. Yes, I can　　　　 B. No, I can　　　 　　　　　　　　 C. Yes, I can't

6.-Would you like a cup of coffee?

-____________.

A. No, I don't want　 B. No, thank you　　　　　　 C.I don't like it

5.Bob can't come out to play because he ____________help Dad in the garden.

A. can　　　　　 B. can't　　　　　　　　　　 C. has to

4.Thanks for ____________ me to the party.

A. ask　　　　　 B. asking　　　　　　　　　 C. asks

3.What are you doing ____________ Monday morning?

A. on　　　　　　 B at　　　　　　　　　　　 C. in