Shanghai is trying to control ________ number of cars on the road to ensure clean air for ________ 2010 World Expo.
. All substances, ___ solids, liquids or gases, are made up of entirely atoms.
. The purpose of the research had a more important meaning for them than ____.
—Did you sec anyone coming into the building? —No, I didn’t —______? —There is no doubt about it.
. It’s been raining for almost a week. ____!
___, I think, and the problems could be settled.