According to the school rules, if a student _________ happen to damage something by accident,he/she should report it to a teacher or the office immediately.

In order to improve your spoken English, you ________ be afraid of losing face. 

I _____thank you too much for all your help to my son while we were away from home.

 According to the agreement, nobody _______ let out how they spent the three days in the cave.

— Listen! Jane is singing in the next room.— It             be her. She has gone to New York.