Exercise 1:Chuyển các câu sau sang câu khẳng định (+), câu hỏi (?) hoặc câu phủ định (-) như gợi ý trong ngoặc:
1. He used to go to work by bus.
(?)……………………………………………………………………………………
2. Nam used to do his homework carefully.
(-)……………………………………………………………………………………
3. The city used to be cleaner and more peaceful.
(?)……………………………………………………………………………………
4. Tom didn’t use to go camping on Saturdays.
(+)……………………………………………………………………………………
5. My friends used to live in the countryside.
(-)……………………………………………………………………………………
Loga
Sinh Học lớp 12
