—Could I borrow your camera(照相机)?
—______, but please give it back by Saturday.
| A．I’m sorry | B．Certainly not |
| C．No, thanks | D．Of course |
Trees used to be ______ for cooking by the villagers in the 1970s.
A. cut up B. cut down C. cut off
Before Monkey King was ______ by Xuanzang, he was held under a mountain.
A. set free B. laughed at C. carried out
All the doctors and nurses in this hospital ______ the patients.
A. go on with B. are patient with C. keep up with
To keep away from germs, we must not spit ______.
A. in danger B. in need C. in public
The river has become much ______ than before because of the waste water from the factories.
A. dirty B. dirtier C. dirtiest