Better _____ all the lights are turned off before you leave the classroom．
| A．to be sure | B．to make sure | C．be sure | D．make sure |
The Hengxin Square is located in ____________ used to be our canteen.
| A．what | B．where | C．which | D．the place |
Helping others is a habit, ________ you can learn even at an early age.
| A．it | B．that | C．what | D．one |
My grandmother always said you should sweat to reduce the when you have the flu.
| A．medicine | B．illness | C．fever | D．pressure |
—Many students like Miss Wang.
—That's ________her classes are lively and interesting.
| A．why | B．because | C．that | D．how |
Every year, ____ graduates take pan in TOEFL for further education abroad.
| A．too much | B．several scores | C．many a | D．scores of |