---Look. The man at the gate _____ be our headmaster. He is always standing there every morning.---No. it ____ be him. He is having a meeting in the office now.
Tom is _______boy.
Annie’s bike is broken(坏), so she _______ walk to school.
Listen! One of the boys ______ in the room.
There _____ a supermarket and two libraries in my school.
It’s an English class. Please don’t _________ Chinese.