Why not ____ help when you were in trouble?
| A．you ask for | B．ask for | C．asking for | D．to ask |
--- ____ 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 |
Danny is always very happy when he has something ___.
| A．eat | B．eats | C．eating | D．to eat |