$PTHH$ $:$
Bạn tham khảo trong hình
`4Al``+``3O_2` $\xrightarrow[]{t^o}$ `2Al_2``O_3`
Choose the best answer.
We are looking for ____ place to spend ____ night.
Please turn off ___ lights when you leave ___ room.
I like _____ colorful costumes of ____ ethnic minority people in Vietnam.