—________do you go to the dentist?
—Let me see, twice a year, maybe.

Lucy ______ at home and read ______ interesting book.

Please tell the students _____ computer games too much. It’s not good for them.

Miss Li teaches _______English. All of us like _____ very much.

-There _______a number of students in our school. The number of them _____over 1000.