Don't forget ______ the light when you leave the office.
When asked what they would volunteer to do, ________ said they were willing to do something they could.
With ________ successful launch of the first space lab module Tiangong-1, China’s space dream has taken ________ step closer to reality.
-–Do you think that we should make preparations for the competition in advance? -–Exactly. ______.
-–Mary knows the city quite well.--She______ well have been there before.
The past two years ______a sharp rise in oil price, which adds to the burden of auto transportation industry.