8. He was so deep in thought, thinking of the problem ______ he knocked into the tree without noticing it.
| A．when | B．while | C．because | D．That |
—Doug, where is your coach, Chow?
—See, he ______ by a group of journalists.
| A．is being interviewed | B．has been interviewed |
| C．is interviewing | D．has interviewed |
Many memories of old times were ______ by the conversation we had during the get-together.
| A．called on | B．called in |
| C．called up | D．called for |
The political situation in Libya will become even worse unless some measures ______.
| A．will be taken | B．are taken | C．have taken | D．are to take |
The flight was put off due to the typhoon. Otherwise, we______ the beautiful scenery in Greece now.
| A．would be enjoying | B．would have enjoyed |
| C．will enjoy | D．must have enjoyed |
We are living in an age ______ we treasure very much, because it sees man’s rapid development.
| A．which | B．when | C．where | D．what |