问题补充:
It is requested that each of the teachers invited a performance at the party.
A. give
B. will give
C. has to give
D. must give
答案:
(答案→)A. give
B. will give
C. has to give
D. must give
解析:It is requested that的主语从句中,谓语动词用“should + 动词原形”,should可以被省略,故选A。