. Before radio and TV, music could only be heard _______, that is, you had to go to places where musicians gave performances.
—It’s good to see you again. —Yes. I keep all the letters __________ you wrote to me over the years.
I know the writer __________ story won a prize for the most imagination.
With the help of __________ people, I can be more successful in volunteer work.
—I’m going to see John tomorrow. —Don’t tell him the result of his medical examination when you __________ to him.
People around the country were excited __________ the astronauts came back to the earth safely.