The students in this school are made_______ school uniforms on Monday.
— Would you like to go to the cartoon show with me?— It sounds like fun, ______I’m too busy.
All passengers______go through safety check before they take a plane.
_____ carefully, Michael! There’s a school ahead.
Air pollution has become__________ than ever before. We must do something to stop it.
Old Mr. Black lives happily with his three dogs. of them are part of his family.