––_______ are you staying there? –– For about two weeks.
Our English teacher, Mrs. Black, ________ in our school since 1992.
The Olympic Games ________ every four years.
The old people and the children must ____________ in our country.
You ____________ to the ball. Why didn't you go?
Betty and her classmates are going to _______ a school magazine, and the magazine __________ New Standard.