--Is it OK if I sit on this chair?
--Sorry. .
| A．Here you are. | B．Take it. |
| C．Not at all. | D．It's taken. |
You can improve your English_______practicing more.
A. by B. withC. Of
I prefer________ sports shoes because they are very comfortable．
| A．wear | B．wears | C．wore | D．to wear |
— I’m not sure you eat vegetables every day.
— I know they are good for health, so I eat them every day.
| A．if; that | B．that; if |
| C．that; that | D．if; if |
The railway______ Qinghai to Tibet is the longest plateau (高原) railway in the world.
| A．connected | B．connects |
| C．connecting | D．is connected |
_____ of the twins has been there before.
| A．Both | B．Neither | C．All | D．None |