(2010·四川高考)—________ I take the book out?—I'm afraid not.

You ________ play with the knife. You ________hurt yourself.

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.

Living in a fast-paced world, we                  get left behind if we stop learning.

When I was a child, I ______ watch TV whenever I wanted to.