You can make a complaint to the local government ____you are happy with the way things are.
| A．unless | B．if | C．once | D．as |
No matter how hard the government has tried to search for it, the missing Malaysian flight MH370 is still nowhere _________.
| A．to find | B．to be found |
| C．to finding | D．being found |
Animals are different from plants ________ they can move when they are attacked by others.
| A．where | B．in which |
| C．for which | D．in that |
The approach _________ the problem is contrary ________ our expectations.
| A．of; to | B．to; to | C．to; on | D．for; on |
She is always thinking more of herself, seldom, ________, offering to help others.
| A．if never | B．if possible |
| C．if ever | D．if any |
---How often do you drop your e-pal a line?
---_______, but usually once a week.
| A．It depends | B．As usual |
| C．Generally speaking | D．Have no idea |