—________will the fog and haze last？
—I’ve no idea．There is no sign of an end．
| A．How soon |
| B．How far |
| C．How long |
| D．How often |
–What do you call this in English?
–It’s stamp. It is used ____ sending letters.
| A．for | B．to | C．with | D．by |
Nobody can stop me ____ working hard at English.
| A．for | B．on | C．from | D．in |
Our sports meeting has been ____ till next Monday because of
the bad weather.
| A．put on | B．put up | C．put off | D．put down |
Do you know the young lady ____ your mother is talking?
| A．who | B．whom | C．with whom | D．which |
Tim’s mum is worried ____ her son’s eyesight as he plays
online games too much.
| A．for | B．about | C．with | D．of |