1．If you aren’t good at thinking，you can’t study ____________.
2．It was ____________ of him to run into the burning house to rescue the baby.
3．The ____________ of America is very important in history.
4．He ____________ his dream by working hard.
5．We ____________(清空)the tomb of everything it contained—we were rich and famous right away.
6．Police were called in to ____________(维持)order.
7．She opened the door quietly so as not to ____________(打搅)the sleeping child.
