Do you know a spaceship flies at about nineteen kilometers ________ second?
—How much did you ___________ your coat?—About 200 yuan.
The teacher told the boys ____________ in the street.
—I called you yesterday evening, but there was no answer.—Oh, I’m sorry. I ________ dinner in my friend’s home.
The girl likes to buy cheap things. She often spends _________ money on _________ things.
—What do you think Lucy will be _________ five years?—I think she will be a doctor.