She ______ have left school, for her bike is still here.
| A．can’t | B．wouldn’t | C．shouldn’t | D．needn’t |
—Do you know what EU stands for, Tommy?
—Sure.It stands for the European Union，________ European political and economic organization that encourages trade and friendship between ________ countries that are members.
| A．an; the | B．a; the |
| C．the; / | D．an; / |
It is announced that________$20,000 reward will be offered for ________ return of the stolen sculpture.
| A．a; the | B．/; the |
| C．a; a | D．/; a |
The most important thing to keep in ________ mind when dealing with________ emergency is to stay calm.
| A．/; the | B．the; an |
| C．the; the | D．/; an |
We can never expect ________ bluer sky unless we create________ less polluted world.
| A．a; a | B．a; the |
| C．the; a | D．the; the |
Failure to face up to painful experience can be ________ form of stress itself, and can increase ________ possibility of illness.
| A．the; / | B．a; a |
| C．a; the | D．/; the |