The young man admitted, after several hours questioning,_______ a wallet from the passenger on the bus.
| A．having stolen | B．to have stolen | C．being stolen | D．to steal |
_____ private cars bring us convenience, they also cause more traffic accidents and pollution.
| A．While | B．As | C．If | D．Since |
______ around the Water Cube , we were taken to see the Bird’s Nest for the 2008 Olympic Games.
| A．Having shown | B．To be shown | C．Having been shown | D．To show |
Her book didn’t ____ children probably because she employed too many scientific terms.
| A．appeal to | B．apply for | C．intend for | D．refer to |
After years of research, he found the key ____ differences between species.
| A．to explain | B．to explaining | C．of explaining | D．explaining |
--- Do you know Anna’s telephone number?
--- ______. As a matter of fact, I don’t know any Anna, either.
| A．I think so | B．I hope so | C．I’d rather not | D．I am afraid not |