----Have you any letters _______, sir?
---No, thanks. You may take a rest.
| A．to type | B．to be typed | C．to be typing | D．typed |
Something ___ to save our earth. Do you think so?
| A．can do | B．must do | C．has to do | D．must be done |
I’ m sorry, I mistook you ___ your sister ___ mistake.
| A．for, by | B．by, for | C．by, by | D．for, for |
The scientists are trying to ___ natural energy to decrease air pollution.
| A．make friends with | B．make full use of | C．make notes of | D．make into |
China is ___ the east of Asia while Japan is ___ the east of China.
| A．in, on | B．on, to | C．in, to | D．to, on |
He spoke so slowly that we all could ___ him.
| A．catches | B．follow | C．understood | D．hearing |