1.It was both a long and tedious ceremony.
2.Formerly,science was taught by the textbook method,while science is now taught by laboratory method.
3.Follow these instructions:Make sure the power supply is turned off,the casing is unscrewed and removed,and the pin is disconnedted from the socket.
4.David wanted three things out of college:to learn a skill,to make good friends and to learn about life.
5.The room was beautiful,the service was impeccable,and I've never tasted better food in my entire life.(如果最后一句也许parrallel,那就是 the food was so good that I've never tasted better ones in my entire life.)