2 . To achieve our goal, we need to think out of the box________________(explore) every possibility. (所给词的适当形式填空）

3 . He often uses that________________look ________________them. ( frighten) (所给词的适当形式填空）

4 . As nobody here knows what is wrong with the old man, we must send for a doctor ________(handle) the problem.(所给词的适当形式填空)

5 . The Great Wall was originally built in the Western Zhou period ________(defend) against the attack of the enemies. (所给词的适当形式填空)

6 . Every year, he donated millions of dollars________(sponsor) charitable activities. （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 . We are organizing an art show for our school students to ________ (exhibition) their works of art. (所给词的适当形式填空)

10 . ________(obtain) the degree, she has to pass all of the examinations. （所给词的适当形式填空）