You should always________a qualified health care provider before taking any medication.
The house with the ground is valued ____ three thousand yuan, but I bought it ____ only one thousand yuan.
—Does David often come to school ____ bus?—Yes, but sometimes he comes ____ his father’s car.
Mr. Johnson starts to work very early in the morning and goes on working until late in the afternoon ________a break at midday.
____you have done might do harm____other people.
The two ladies are ________ the same age, but there seems to be ten years ________ them.