Luyện tập 10: Chọn giới từ thích hợp để hoàn thành câu:

1. The cat is sleeping (on, under, in) the couch.
2. The book is (on, in, at) the shelf.
3. We are going to the park (at, on, in) the afternoon.
4. I live (in, on, at) a small town in the countryside. 
5. The teacher is standing(before, behind, between) the students.