楼上那个翻译有许多问题.demand表示“要求”的时候从句必须用虚拟语气.demand表示名词时后面的介词应该为for而不是of.还有一系列问题就不一一指出了.
1.These years new cars are in great demand.
2.The boss demanded Mary finish it in a week.
3.She demanded to see the principal (中小学校长)/president（大学校长）.
4.This operation highly demands carefulness.
5.Good secretarys are in demand everwhere.
belief
1.Some reports about her are unbelievable.
2.I believe he will succeed.
3.It is believed that things will get better.
4.Believing he would help her,she wrote him a letter.