1. It is time ________________ (有关当局采取适当的措施来解决交通问题的时候了).
　　2. In the sports meeting, _______________ (他替换了那个受伤的运动员).
　　3. _________________ (尽管这对老夫妇生活简朴),they enjoy true happiness.
　　4.The teacher always told us that ________________(我们必须把所学到的知识应用于实际工作中).
　　5. Since the examination is around the corner,________________(我不得不放弃做运动).

　　答案与解析:
　　1. (that)the authorities concerned took proper steps to solve the traffic problems
　　2. he substituted for the injured player
　　3. Despite the fact that the old couple leads a very plain life
　　4. we should apply what we learned to the practical work
　　5. I am compelled to give up doing sports