Dựa vào gợi ý viết thành câu.
1.This exercise/difficult/that one.
2.He/learn/drive/motobike/moment.
3.They/study/best/school/city
4.what/popular/sport/country/?
5.who/famous/singer/country/?
6.Country/cheap/and/safe/city
7.we/collect/paper/metal/plastic/recycle
8.People/destroy/environment/now
9.You/should/damage/tree/pick/flowers
10.population/word/grow/now