. I ...........called...........(call) Mr Wilson at 9 last night, but he (not be)..............wasn't..............at home. He (study) .................was studying................... at the library

2. I ..................didn't hear.................... (not hear) the thunder during the storm last night because I .............was sleeping............... (sleep)

3. It was beautiful yesterday when we went for a walk in the park. The sun.............was shining....................(shine). The birds................were singing............(sing)

4. My brother and sister...............were talking............ (talk) about something when I ...................walked................ (walk) into the room.

5. Tom went to his friends ‘house, but the boys ......................weren't...............(not be) there. They (play)..................were playing.................soccer in thevacant lot down the street.

6. The little boy ..........fell.......... (fall) asleep while his mother...........was reading...........(read) him a story.

7. I really enjoyed my holiday last January. While it..........was snowing..........snow) in Iowa, the sun..........was shining.......... (shine) in Florida.

8. While Ted ...............was shoveling............. (shovel) snow from his driveway yesterday, his wife ..............brought.................(bring) him a cup of hot chocolate.

9. John .....................had............... (have) a car accident last week. He ......was driving...... (drive) down the street when suddenly a lorry ............hit............ (hit) his car from behind.

10. Ten years ago, the government ..........decided............. (decide) to begin a food programme. At that time, many people in the rural areas ............were starving.............. (starve) due to several years of drought.

11. They...........were waiting..............(wait) for me when I ..................arrived............... at the station (arrive)

12. She .............was swimming........ (swim) in the sea when I.............saw................her (see)

13. ............were ............they............playing...........(play) tennis when it .......started.......... raining (start)?

14. We ...........were driving................. (drive) home from the theatre when the police ...........stopped...................(stop) us.

15. The wind was blowing................... (blow) very hard when I ................went............go) out this morning.

Chúc bn hok tốt!!!!