2014春季英语人教版新课标选修7u3同步自测题(1)及解析答案 unit 3 under the sea单元练测卷(时间:90分钟 满分:120分) ⅰ. 单项填空(共15小题;每小题1分,满分15分)从a、b、c、d四个选项中选出可以填入空白处的最佳选项。 1. many lifestyle patterns do such __________ great harm to health that they actually speed up __________ weakening of the human body. a. a; / b. /; the