-What did you do in today's history class?-We talked about the characters____ achieved fame in American history.
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.
—You should ________ your son. He works harder than before.—Thanks, I will.