One way to ________ species under threat of extinction—whatever the cause—is to remove them to zoos or parks and feed them there.
| A．betray | B．resist | C．preserve | D．abandon |
We went to Canada to travel and my cousin________as our guide.
| A．palyed |
| B．showed |
| C．acted |
| D．performed |
The question now________at the meeting is very important.
| A．discussed |
| B．to be discussed |
| C．being discussed |
| D．discussing |
—You are so lucky.
—What do you mean________that?
| A．for |
| B．in |
| C．of |
| D．by |
What rate will I get if I________my dollars into euros?
| A．turn |
| B．become |
| C．convert |
| D．get |
The manager hasn't been back yet.________， we have to put off our meeting.
| A．So that |
| B．Such as |
| C．As a result |
| D．Such that |