--- Look, the factory is pouring waste water into the river.
--- That’s terrible! Why not _____ them _____ that?
A. keep; doing
B.to keep; to do
C.stop; doing
This is _______ MP4. Yours is over there.
| A．my | B．me | C．I | D．mine |
Many accidents ______ by careless drivers last year.
| A．are caused | B．were caused | C．have caused | D．will cause |
I will send you an e-mail as soon as I ______ in Canada.
| A．arrive | B．arrived | C．am arriving | D．will arrive |
--- What were you doing this time yesterday?
--- I ______ on the grass and drawing a picture.
| A．sit | B．sat | C．am sitting | D．was sitting |
My aunt is a writer. She ______ more than ten books since 1980.
| A．writes | B．wrote | C．has written | D．will write |