On ________ , American children often give flowers and cards to their mothers to thank them.
He is a ____, and he works in Beijing Hospital.A. manager B. policeman C. doctor
—What time do you usually get up?—I usually get up ____ six o’clock.A. on B. in C. at
—What’s _______________ name?—My name is BOSS.A. you B. your C. yours
They go to school ________.
I want to know___________.