____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
| A．While | B．As | C．If | D．Since |
This new-type machine____________ little room.
| A．takes up | B．is taken up |
| C．has been taken up | D．is taking up |
--You don't look so well, Mary. What's the matter with you?
--Why?___________.
| A．I'm quite myself | B．Fine, think you |
| C．I felt bad | D．I'm not myself |
China has hundreds of islands, ___________ is Taiwan Island.
| A．among them the largest | B．and the largest of which |
| C．and the largest of them | D．but in which the largest |
You must have waited here for a long time ,___________you?
| A．mustn’t | B．didn’t | C．haven’t | D．hadn’t |
Nearly________ of the surface of our planet is covered by water.
| A．seven-ten | B．seven-tenth | C．seven-tenths | D．seventh-ten |