With the development of science and technology，there is no doubt_____Chinese
astronauts will land on the moon in the near future.
| A．whether | B．that |
| C．what | D．which |
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 |
_________ Mary likes chatting, she is careful about making friendswith strangers online.
| A．Even though | B．No matter |
| C．As long as | D．As a consequence |
_________ has been proved in study that seat belts save lives.
| A．Want | B．As |
| C．That | D．It |
The paint came off as a result of _________ to the rain. I must repaint the windows before they go rusty.
| A．contribution | B．discrimination |
| C．exposure | D．exhibition |