Thêm từ vào chỗ ko hợp lý của câu :
1. Lan play piano at the moment.
2. The boy study Math right now.
3. They now have breakfast school canteen.
4. The childen laugh and talk noisily class.
5. He listen music now.
6. The students often read scientific books library.
is playing
is studying
are having
laughs and talks
is listening
reads