11.She ( not eat)...........didn't eat.......................fish and crab yesterday.
12.Lan ( not go)..........didn't go.......................Ho Chi Minh city two years ago.
13.My parents ( not take)............didn't take......................to Vung Tau last week.
14.We (not have)...........didn't have.......................a lot of friends in Ha Noi
15.Were Lan and Hoa (be)..............................at your school two years ogo?
16.What did they ( play)....play............................last week?
17. What did Hoa (try).............try.....................on yesterday?
18. Who (talk).......did talk.....................................to about the film on TV last Monday?
19.Where did they ( stop)...........stop...................on their way back last Sunday?
20. What did the student (wear) .........wear..................................at school two years ago?