-----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.
--You look worried. What's your ? --I have trouble learning maths.
I crossed the street to avoid him, but he saw me and came towards me.
I don't have any close friends here. I feel from time to time.
Our teacher often told us that we should learn experience.
Before you Send a letter in the post office, you must buy a .