-----Look! The girl dancing in the gym ____ be Joe. She is the girl who loves dancing too much, you know. ----- No, it ____ be her. Joe has gone to Shanghai.
—Can you tell me ________ this morning? —Sorry,I've no idea.
—Tom, may I use your pen to the application (申请) form? —Sure. Here you are.
—How long will the summer English courses ? —For six weeks.
Smile to the world, the world will smile back to you.
A person who will travel to a foreign country must carry a .