Mark has _____ good command of English. Therefore, he plays _____very important part in our team.
| A．/; a | B．/; the |
| C．a; a | D．a; the |
—The Internet is amazing, isn't it?
—Yes. Just __________ it into a socket and you are instantlyconnected to the rest of the world.
| A．to plug | B．plug |
| C．plugging | D．plugged |
Lucy and Mary are two of __________ kind and they both play __________piano in their leisure time.
| A．a; the | B．a; / |
| C．the; the | D．the; / |
The smile on Mother's face suggests that she _________ satisfied with what her daughter has done.
| A．should be | B．is |
| C．was | D．be |
A real friend will help you when you are in trouble while fair-weather friends will _________ you.
| A．ignore | B．support |
| C．honour | D．recognize |
If you don't want to be _________ the mercy of others, you'll have to start a business of your own.
| A．in | B．at |
| C．for | D．on |