1 . You may drink, smoke, be overweight and still reduce your risk of ________ (die) by running. (所给词的适当形式填空)

2 . After ________ (spend) some time looking at all the defensive equipment at the wall, we decided it was time for some action and what better than to ride on a piece of history!（所给词的适当形式填空）

3 . The key to ______ (solve) the problem is to meet the demand made by the customers. （所给词的适当形式填空）

4 . I quickly lower myself, ducking my head to avoid ________（look） directly into his eyes so he doesn't feel challenge. （所给词的适当形式填空）

5 . As your ________ , I am responsible for   ________you in preparing the experiment.(assistance) (所给词的适当形式填空)

6 . I had as much fun sailing the seas as I now do________(work) with students. （所给词的适当形式填空）

7 . To prevent the rich and powerful________ (abuse) their power, the government laid down related laws. (所给词的适当形式填空)

8 . The superstar wore sunglasses when shopping without________ (notice). （所给词的适当形式填空）

9 . Why are you ________ (oppose) to ________ (put) the plan into practice? （所给词的适当形式填空）

10 . You’d better avoid ________ (raise) a question like that which disturbs the class. （所给词的适当形式填空）