–Nina, do you know ____?
--Sorry, I don’t know.
A. where does Emily live B. where Emily is living C. where Emily live
—I’m leaving now.
—______ you turn off the lights and the computer.
| A．To make sure | B．Make sure | C．Made sure | D．Making sure |
The population problem may be ______ one of the world today.
| A．the most | B．most difficult | C．the greatest | D．more interesting |
Don’t ______ so often. It’s bad for your health.
| A．get up | B．stay up | C．look up | D．come up |
—Mum, when can I watch TV?
—As soon as your homework ______.
| A．finish | B．finished | C．is finished | D．will be finished |
—I hear Mr. Zhang has gone to Beijing for a meeting.
—Really? Do you know when he ______?
| A．leaves | B．was leaving | C．has left | D．left |