216. If you feel dizzy in a coal-burning room, that’s lack of . Please open the window and air the room at once.
| A．onion__________ | B．hydrogen__________ | C．oxygen | D．carbon-dioxide |
Those who have ________ floods and sandstorms know the importance of
environmental protection.
| A．gone over | B．gone through |
| C．got through | D．got over |
You'd better ________ some money for special use.
| A．pick up | B．set aside |
| C．put off | D．give away |
To ________ it simply, if you don't apologize to him，you will lose this friend.
| A．put | B．make | C．speak | D．talk |
My suggestion is that you ________ much meat.
| A．wouldn't take | B．shall not take |
| C．not have | D．won't have |
When he was there, he ________ go to that coffee shop at the corner after work every day.
| A．must | B．should |
| C．would | D．might |