1 . ________(stress)to everyone the importance and value of these historic sites, the government will strengthen regulations to protect them. (所给词的适当形式填空)

2 . ________ (facilitate) a positive change in our bad habits, we must first examine our bad habit cycles and then try to adapt them. (所给词的适当形式填空)

3 . While she was in hospital，I always go there ________(keep) her company. (所给词的适当形式填空)

4 . The medicine is used _________ (relieve) pain and to promote sleep. (所给词的适当形式填空)

6 . Siberian tigers and leopards need large areas ________ (hunt) for food. (所给词的适当形式填空)

7 . The two sides are trying to do something to________(strong) their friendship. （所给词的适当形式填空）

8 . Athletes in the host country (主办国) can sometimes use the cheers and shouts from the audience to ______(strength) their determination. (所给词的适当形式填空)

9 . _________ (make) our school life more colorful, we will organize a variety of extra-curricular activities. (所给词的适当形式填空)

10 . ________(keep) their body under control, astronauts have to move slowly. （所给词的适当形式填空）