题目

选词填空 prior to, be exposed to, have a profound effect on, be determined to do, come true （1） We get the work done before New Year's Day. （2） Just phone in your order three or moredays departure. （3） His coach was Frankie Walker, a man whowould soon his life. （4） Studying abroad, he a new way of life. （5） His dream of becoming a university teacherhas .15．$\sqrt{（-49）^{2}}$的平方根是（　　）A．49B．7C．±7D．±49