Do you know a spaceship flies at about nineteen kilometers ________ second?
My English teacher asked me _____ half an hour _____ English newspapers every day.
Jim is going to run in the race. All of us will go to ______.
I __ interested in the history of China.
—What time did you get there this morning? — _______ eight.
The policeman asked us _____him send the old man to the hospital.