4. Our classmate are going to have a picnic near a lake.
9. They are a vacation now.
8. Her uncle and aunt are going to stay in Ha Noi for two weeks.

IV. Điền vào chỗ trống giới từ thick hợp
4. Our classmate are going to have a picnic.........near..........a lake.
9. They are....on...........vacation now. (cấu trúc: tobe on vacation: đang nghỉ lễ)
8. Her uncle and aunt are going to stay........in......Ha Noi........for.........two weeks.

IV. Điền vào chỗ trống giới từ thick hợp
4. Our classmate are going to have a picnic.........near..........a lake.
9. They are....on...........vacation now. 
8. Her uncle and aunt are going to stay........in......Ha Noi........for.........two weeks.