The book has helped me greatly in my daily communication, especially at work ________ a good impression is a must.
| A．which | B．when |
| C．as | D．where |
Every evening after dinner, if not from work, I will spend some time walking my dog.
| A．being tired | B．tiring |
| C．tired | D．to be tired |
AIDS is said________the biggest challenge to both men and women in that area over the past few years.
| A．that it is | B．to be |
| C．that it has been | D．to have been |
The mobile phone has become a major means of communication, _____us to keep in touch as well as to surf the Internet to keep us _____of the latest news.
| A．permitting; informed |
| B．to permit; informing |
| C．to permit; to be informed |
| D．permitting; having informed |
---What do you think of his talk on Information Technology?
---Oh, excellent. It’s worth_____________.
| A．listening to | B．being listened to |
| C．listening | D．to be listened to |
I like getting up very early in summer. The morning air is so good______.
| A．to breathe | B．to be breathed |
| C．breathing | D．being breathed |