1 . His parents, like most, hoped he would go to a big city ________ (find) a teaching job. （所给词的适当形式填空）

2 . 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)

3 . 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)

4 . Every year, he donated millions of dollars________(sponsor) charitable activities. （所给词的适当形式填空）

6 . 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)

7 . ________(earn) a living, some people opened up shops and restaurants in Chinatown. (所给词的适当形式填空）