The farmers built long fences, __________ keeping the wild dogs out of them.
| A．aim at | B．aim for | C．aiming at | D．aimed for |
Mr. Smith,of the speech, started to read a novel.
| A．tired; boring |
| B．tiring; bored |
| C．tired; bored |
| D．tiring; boring |
I couldn’t . The line was busy.
| A．go by |
| B．go through |
| C．get in |
| D．get through |
It is highly desirable that every effort to reuse the pollution in Beijing.
| A．is made |
| B．was made |
| C．were made |
| D．be made |
It is said that Tom’s sister fell off her bike on her way to school, _____ in the left leg.
| A．seriously damaging |
| B．hurting badly |
| C．breaking seriously |
| D．badly hurt |
to his research, he spared no time to spend a weekend with us.
| A．Devoting |
| B．Devoted |
| C．Caught |
| D．Lost |