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
c. a; thed. /; ／
2. after the earthquake, the first thing the local government did was to provide __________ for the homeless families.
