Tom : Hi, Cathy. ___1__                                 

Cathy: I have to finish my project on the history of the Internet. What about you?

Tom : 2 If it’s fine, we’ll go camping. Would you like to join us?  Cathy: I’d like to, but the deadline for my project is next Monday.

Tom : What a pity!   3                                     

Cathy: Yes, please. Can you suggest any good reference books?

Tom : You may want to read Origins of the Internet and The Digital Future.

Cathy: I’m reading the two books.    4                        

Tom : Go to the Science Museum website, and you’ll find lots of up-to-date information.

Cathy: Good idea. Thanks for your help.

Tom :    5                                        

A．Never mind.

B．Don’t mention it.

C．Any other suggestions?

D．Will you come next time?E.it depends on the weather          F.Anything I can do for you G.What are you up to this weekeed?

GSM手机的逻辑／音频部分可分为（）和（）两个子部分。