The train leaves at 6:00 p.m. So I have to be at the station ____5:40p.m.at the latest.
If we _______ adequate preparations, the conference wouldn’t have been so successful.
(2012全国新课程)I use a clock to wake me up because at six o'clock each morning the train comes by my house.
I’m going to Europe on vacation together with John if I _______ find the money.
Don’t handle the vase as if it ____ made of steel.
We ______ the difficulty together, but why didn’t you tell me?