Had it not been for the haze(霾)weather phenomenon, there fewer car accidents in Beijing then.
__________ the train arrived, some people were waiting inside the station __________ others were heading for the platform.
It was __________ fan that we couldn't hear anything.
Gunpowder,__________ we all know, was invented in ancient China.
Strong typhoons hit this area very __________. Normally, they form and come here between July and August every year.
We all write __________, even when there's not much to say.