The professor’s research finally proved to be ______, though he had spent a lot of money on it.
---- Hi, John! Haven’t you heard Peter was elected president? ---- ________? He is a boring man and doesn’t care about others.
John felt very embarrassed ________ he entered the government hall.
We live too far from the city to get a strong TV ________.
It was last Saturday ________ we visited the History Museum.
I suggested that the problem _____as soon as possible.