--- What is our head teacher like, do you know? --Oh, he is very kind, ________ he looks very serious.
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 computerin 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.