Mary clapped her hand over her mouth _______ she realized what she had said.
| A．while | B．as soon as |
| C．suddenly | D．then |
Amy joined a painting group but didn’t seem to _______, so she left.
| A．show off | B．go up | C．fit in | D．come over |
____ is known to us all is that the World Expo 2010 will take place in Shanghai.
| A．It | B．What | C．As | D．Which |
I have reached a point in my life I am supposed to make decisions of my own.
A which B where C how D why
Nowadays people sometimes separate their waste to make it easier for it ______.
| A．reusing | B．reused | C．reuses | D．to be reused |
The books are easily ___________ to the readers as all the shelves are open.
| A．relevant | B．accessible | C．acceptable | D．sensitive |