M：Well，my computer that __3__(buy) three years ago is really old，so most software doesn't __4__(work) well.

W：Oh，I can show you how to use it.

M：How long does it take to download MP5 files?

W：I usually __5__(download) at least 30 a day.

M：Do you often download any TV programs or movies that __6__(broadcast)? W：Sure.

M：Could you please download some for me?

W：Sure，just tell me what you want.

M：Let me see.I __7__(hear) a lot about TV show __8__(call) Friends.

W：No problem，did you know that there are many Friends' forums online? M：What's a forum?

W：It's a place where you can chat to other people who __9__(have) similar interests

as you.

M：Do the friends stars ever show up there?

W：Sometimes，people say they are the Friends' stars，but you never know who you __10__(talk) to.

答案 1.have been chatting e 3.was bought

4．work 5.download 6.are being broadcast 7.have heard

8．called 9.have 10.are talking

B It was getting dark when I __1__(get) home.It was cold and I __2__(wear) a coat.I walked up to the door and put my hand into my pocket to take out the key，but I couldn'tfind it.I suddenly remembered that I __3__ (leave) it on my desk in the office.It really didn't make any difference.I knew my wife __4__ (be) at home and the children must have come back from school by now,so I __5__(knock) at the door.There was no answer.I __6__(continue) knocking at the door for some time.I __7__(get) angry.Then I remembered something the office boy __8__(tell) me at noon.He said that my wife __9__(phone) saying that she __10__ (go) shopping in the afternoon with the children.It seemed that nothing __11__ (can do) and I __12__(shut) out of my house.

答案 1.got 2.was wearing 3.had left 4.was

5．knocked 6.continued 7.was getting 8.had told

9．had phoned 10.would go 11.could be done 12.would be shut