问题补充:
It is demanded that the plan out as soon as possible.
A. must be carried
B. is to carry out
C. carried
D. be carried
答案:
A. must be carried
B. is to carry out
C. carried
(答案→)D. be carried
解析:在It is demanded that… 这种结构的主语从句中,谓语动词用“ should + 动词原形”,should可以省略。