(1)Cyclamates were introduced in the early 1950's as alternative sweeteners for use by individuals who needed reducing their sugar intake for medical reasons.

请问为何D 错? need 后面不是也可以用Ving?

(2) The Hopi, descendants of the prehistoric Anasazi people, are a Pueblo people who of the southwestern United States.

D 错的明显, 但我不明白为何 C正确? 复数名词前怎能加s?

请大家指教~

第一题是对need 的用法没有弄清楚啊！ need +to do 表示主动，need +doing 是need to be done 的意思啊表被动，在这里句子的意思很明显表主动，所以D 不对啊！

第2题我也不是很清楚啊！在这里who 后面是一个定语从句修饰people,那么为什么who 后面不是一个完整的句子呢？