---You should have prepared your speech for the meeting , Mr. Smith . ---Yes , I know . But how could I do____ the meeting date fixed so soon?
The air ______ different gases _____ together.
Our school was moved to Gaoxin District in 2005, and the new campus is ________ the old one.
The _____ as one travels by boat along the Changjiang Three Gorges is fantastic.
I _____ all the cooking for my family, but recently I’ve been too busy to do it.
--- How many concerts ____ up to now? --- About 25. Last night we ____ our biggest one.