x^2+ax^2-y-ax+cx^2-cy
giúp mik nha.Cảm ơn nhiều
Choose the best answer to complete each sentence.
To save electricity, please don’t forget to ______ all the lights before you leave the classroom.
To save electricity, please don’t forget to ______ all the lights before you leave the classroom.
| A. turn off | ||
| B. look up | ||
| C. come back | ||
| D. take after |
