—Show me your permit, please.—Oh, it's not in my pocket. It ________.

This printer is of good quality. If it ________ break down within the first year, we would repair it at our expense.

Take care! Accidents _________ happen along this part of the road.

“No student,”the headteacher stressed, “_______ go out of the school after ten o’clock at night without my permission. ”

We can do a lot to stay healthy. __________, we should eat a balanced(平衡的) diet.