hiện tại đơn và hiên tại tiếp diễn:
1 . he usually ( water)................ the trees in the morning.
2. she(not listen) ................ to the radio now.
3. the sun (ride ) .................in the East and (set)............... in the West.
4. Hanh (not read)..................with the friends at the moment.
5. she (go)................to work by bus tomorrow.
6 kien and tuyen (be)..............good students.
7. Hung often (not go).............camping in the summer.
8..........you often(write) ...................to your friend ?