The number of students in our school 4000 and a number of them good at playing ping pong.
—_______________? -- I have a fever.
—______do you write to your parents? -- Twice a month.
As for _____homework, we do ________homework every day.
The boy can speak English well, _____he’s only ____eight-year-old boy.
What should I do ? Can you give me _______?