Briggs will ________as general manager when Mitchell retires.
— It’s a long time ______I saw you last.— And what is a pity now that it will be a long time______ we see each other again.
So quickly is science and technology advancing ______ is a possibility today may be a reality tomorrow.
With the widespread of fog and haze(雾霾) in central and eastern China, our government is supposed to ______ their efforts to prevent further pollution.
The Yeti is said to be a large, hairy animal walking _____two feet like a human being and moving _____ amazing speed and strength.
— Could you meet me at the airport?— I'd like to,but I'm afraid I ______ a very important meeting when you return.