___ the beginning of the meeting, the president made a speech ___ how to reduce pollution.
| A．at; in | B．at; on | C．in; on | D．on; on |
The policeman is still not sure ______ the young man killed himself or not.
| A．if | B．that | C．whether | D．weather |
The work ________ in two hours. Let’s hurry.
| A．must be finish | B．must finish |
| C．will finish | D．must be finished |
— Let’s play football on the playground.
— It’s too hot outside. I would rather______ at home than ______ out.
| A．to stay; go | B．staying; going |
| C．stay; to go | D．stay; go |
The price of the house is too ______. I am afraid I can’t afford it.
| A．cheap | B．expensive |
| C．low | D．high |
We are covering these __________ girl’s wonderful performances__________.
| A．alive； live | B．lively； alive |
| C．lively； live | D．alive； living |