After __________ series of unsuccessful attempts, he has finally passed __________ driving test.
| A．/; the | B．a; the |
| C．the; a | D．/; a |
—Obviously, the boss looks happy again, doesn’t he?
—Yes. It’s said that he has ______ the difficult problem.
| A．succeeded in solve | B．tried to solve |
| C．managed to solve | D．been solved |
A concert will be held in our city _____ the great musician.
| A．in search of | B．in charge of |
| C．in memory of | D．in favour of |
We must do whatever we can _____ the river _____ any more.
| A．to keep; polluted | B．to prevent; being polluted |
| C．keep; polluted | D．prevent; being polluted |
People who want to cross Canada in less than five days forget the fact _____ Canada is 5,500 kilometers from coast to coast.
| A．whether | B．that | C．how | D．why |
As we all know, Asia is _____ Europe.
| A．four times as large as | B．bigger than four times |
| C．four times as much as | D．four times the size as |