We should do everything we can _______ the birds _______ danger.
| A．to protect; away | B．protected; from |
| C．protecting; in | D．to protect; in |
I’ve ____ met her before, so I don’t know her.
| A．never | B．ever | C．just | D．yet |
--- ____ have you been a member of Greener China?
--- For two years.
| A．How often | B．How long | C．When | D．How far |
--- Have you ____ your key?
--- No, I’ve ____ for it everywhere, but I can’t find it.
| A．find; looked | B．looked; found | C．found; looked | D．looked; looked |
My brother always ____ his lesson, so he is a top student.
| A．works hard at | B．work hardly at | C．work hard at | D．works hardly at |
The dog is very ___, and it can work out the problem____.
| A．smart; easy | B．smart; easily | C．smartly; easily | D．smartly; easily |