Successful people have some good qualities and above all, they are never ________ a simple life so they keep fighting until they are top ones．
| A．interested in | B．curious about |
| C．content with | D．confident in |
The World Expo is like __________ great stage for cultural exchange, bringing people into closer contact with __________ rest of the world.
| A．a; / | B．the; / |
| C．a; the | D．the; the |
__________ without friends __________ the most difficult challenge for Chuck while living on the island.
| A．How did he survive; were | B．How he survived; were |
| C．How did he survive; was | D．How he survived; was |
The new plane will __________ a series of test flights before it is put into use.
| A．go off | B．go down |
| C．go through | D．go up |
In April, thousands of holidaymakers remained __________ abroad due to the volcanic ash cloud.
| A．sticking | B．stuck |
| C．to be stuck | D．to have stuck |
There are __________ students in the school. But I don't know __________ the girls among them.
| A．a number of; a number of |
| B．the number of; the number of |
| C．a number of; the number of |
| D．a number; a number |