用所给动词的正确形式填空

　　1. Where ___________ you _____________ (be) these days?

　　2. Great changes _____________(take) place in my hometown in the past ten years.

　　Many new factories_____________ already __________(put) up and a new theatre____________(build ) soon.

　　3. "_________ you___________(buy) the dictionary?" "No, I haven't.

　　When I _________ (get) to the bookstore  yesterday, all the dictionaries__________ already ___________(sell) out."

　　4. "Where ____________(be) you this time yesterday?" "I_________(be) at home.

　　I ____________(go) over my lessons then."

　　5. When I _________ (enter) the room, he ________(not notice) me, for he _________(work) at a maths problem.

　　6. Mr. Brown _________( make) a lot of friends since he_________(come) to work in Wuhan two years ago.

　　7. By the end of last year they ___________ (learn) more than 1 000 new words.

　　8.Mr. Green _____________(visit) all places of great interest in China since he came to China.

　　9. Tom said he__________(study) Chinese since three years ago.

　　10. Could you tell me if you _________(read) the story book?