Her question was so difficult that I could not __________ of it at all.
| A．make up | B．make difference |
| C．make sense | D．make impression |
The purpose of the campaign is to raise the public’s_______ of the dangers of passive smoking.
| A．existence | B．connection | C．awareness | D．consciousness |
A recent study has come up with _____ unexpected conclusion that ____ Africa elephants should be divided into two different species.
| A．a, the | B．an, the | C．an, an | D．the, the |
If I long enough to have a job, I would choose to be a doctor,those AIDS patients．
| A．had lived; helping | B．should live; help |
| C．were to live; helping | D．should have lived; help |
Once a difficult and even dangerous place , Vietnam is now a friendly detestation that welcomes visitors from all over the world .
| A．considered; visiting | B．considered; to visit |
| C．considering; visiting | D．considering; to visit |
There are no easy answers to questions brought to us by the rapidly changing world, we can try to turn challenges into opportunities．
| A．so | B．but | C．for | D．then |