This new kind of chemicals will help keep the air, soil and water________ from pollution.
| A．free | B．empty | C．loose | D．short |
Would you like tea or coffee?
-, thank you. I've just had some water.
| A． | Either | B． | Both | C． | Any | D． | Neither |
The exam results will be on Friday afternoon.
| A．put down | B．put off | C．put up | D．put away |
No matter how, it is not necessarily lifeless.
| A．a desert may be dry | B．dry a desert may be |
| C．may a desert be dry | D．dry may a desert be |
You are old enough to your own living.
| A．win | B．gain |
C．take | D．earn |
Twenty students want to attend the class that aims to teachto read first.
| A． | what | B． | who | C． | how | D． | why |