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5. ―These farmers have been to the United States. 

  —Really? When        they        (go) there?

4. -Have you heard about the recent election?

  -Sure,it        (be) the only thing on the news for the last three days.

3. When you      (live) here for many years,you will find you can't leave here.

2. When I was at college,I     (learn) two foreign languages but I     

(forget) most now.

1.I am so lucky because it is the third time that I        (visit) the beauti- ful coastal city Qingdao.

5. I stayed in Beijing for two days. And I have had a good time there.     

4. It was the first time that I have read such a moving story.       

3. Great changes took place in this field in the last five years.       

2. 1 travelled to many cities of China since I was young.     

1. John knows the city well. He has gone to the city before.