1.had got,became

2.arrived,stopped,was blowing

3.studied

4.got,was standing

5.visited,were packing,left

6.were watching

7.were you waiting,was waiting, hasn't come

8.happend

9.Do you often go ,I haven't been there

10.said,learns,has learnt,made

1 had got, became

2 arrived,had stopped,was blowing

3 had studied

4 has got,is standing

5 visited,were packing,will leave

6 are watching

7 how long haven't you been waiting,have been waiting, hasn't come.

8 has happened

9 do you often go to the library?

haven't been

10 he said that his son was learning French.He has been learning it for three years and has made great progress.