Answer:
1/ Nam said his uncle often planted the vegetables in the afternoon.
2/ She said her uncle would not plant the vegetables the following day afternoon
3/ He asked me if my uncle planted the coffee trees in the field the previous years .
4/ Nga said Mr and Mrs Pike had just read these newspapers
5/ Lan asked Minh if his sister took the vegetables to market everyday
6/ She said her often listened to music at night
7/The teacher asked me if they had written the answers in the exercise books
8/Lan's mother said her daighter usually brushed her teeth before meals
9/ Nga asked Nam his father watched Joo Mong film the previous night, Nam ?
10/ They said us had to do the assignments then.
11/Lan said her sister seldom rode a bike to school.
12/ She said that students at secondary school and high school rarely sang English songs
13/ Ngan told Mai not to feed the chickens."
14/ They said their teacher sometimes explained the difficult lesson
15/ My teacher of Geography said the Earth moves around the sun
16/ Nam said he was doing his homework then
17/ He asked if i could meet him after class
18/ Our teacher told not to talk in class
19/ The policeman asked me to show him my driving licence
20/ The man told me not to touch this button or you'II get an electric shock
Explanation: