`text{1.}`  Mark's put on 5 kilos since he quit smoking.

`text{2.}` Joana doesn't eat much because of overweight.

`text{3.}` I had less opportunities than him.

`text{4.}` Tuan hasn't done the gerdening since he was 15.

`text{5.}` The last film is not the same as the film.

`text{* Hoàn chỉnh câu :}`

`text{1.}` It is dangerous to let children play in the kitchen.

`text{ It is dangerous + to V }`

`text{2.}` My mother used to look after younger sister.

`text{S + used to + V bare}`

=>

I/

1. Mark's put on 5 kilos since he quit smoking. (put on 5 kilos : tăng 5 cân)

2. Joana doesn't eat much because she doesn't want to be overweight. ( in order to V : để làm gì)

3. I had fewer opportunities than him. (fewer : ít hơn + N đếm được số nhiều)

4. Tuan hasn't done the gardening since he was 15. (thì HTHT have/has V3/ed; since + mốc thời gian)

5. The last film is not the same as the film. (the same as : giống)

II/

1. It is dangerous to let children play in the kitchen. (It's adj to V)

2. My mother used to look after younger sister. (used to V : đã từng...)