3. in ( take part in : tham gia )
4. on ( on foot = walk: đi bộ )
5. on ( Friday: dùng "on" )
6. in ( in danger: gặp nguy hiểm )
VII
1. C homeworks -> homework ( homework là danh từ ko đếm được )
2. B some -> any ( any dùng trong câu phủ định )
3. C any -> some ( dùng "some" trong câu mời )
4. C stands -> is standing ( dựa vào ngữ cảnh của câu nên chia hiện tại tiếp diễn )
5. C in -> to
VIII
1. This book isn't as expensive as this one.
2. When did you started playing soccer ?
3. Peter is interested in listening to music.
4. My sister is a careful pypist.
5. It takes them 2 hours to clean the window.
