The plane will arrive in Haikou in half ______ hour.A. a B. an C. the
I usually ______/'præktIs/ the piano after school.
Most of the students in our city go to school by ______ [baik].
We should _______/ki:p/ quiet in the library.
My mother bought me a computer ______ [geim] on my ninth birthday.
Could you tell me _____ tomorrow afternoon?