Viết lại câu 1. It is interesting to watch Viet Nam Idol ->I find...................................................... 2.Some students drop litter in classroom.This makes the classroom dirty.(which) ......................

`1.` I find watching Viet Nam Idol interesting.

`->` It + be + adj + (for sb) + to V

`->` Find + Ving + adj : Thấy làm gì thế nào

`2.` Some students drop litter which makes the classroom dirty in classroom.

`->` Which thay thế cho N chỉ vật, thay thế cho "This"

`1`. I find watching Viet Nam Idol interesting.

`->` S + find + V-ing + adj

`2`. Some students drop litter which makes the classroom dirty in classroom.

`->` "which" thay thế cho this