Many accidents ______ by careless drivers last year.
| A．are caused | B．were caused | C．have caused | D．will cause |
--- Where is Mary?
--- She ____ to Harbin.
| A．has been | B．has gone | C．had been | D．goes |
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 |