Our physics teacher told us that the light ___faster than the sound.
Our team tried our best, ________ we failed the match at last.
Mr. Li will go to Guangzhou by air. His workmates are ______ at the airport.
The computer in 1946 in America.
—Why are you so happy today? —Because I to London with my parents tomorrow.
The policeman told us __________ the street when the traffic light was red.