紧急求助：语法

这是改错，a,b,c,d,是可能的错误：）

3. It is said that no potential frontier has such fired the imagination or changed the ingenuity of humankind as has space.

(a) is said
(b) such
(c) ingenuity
(d) as has

4. Lactose, a sugar present in milk, is one of simple sugars used in food preparations for infants.

(a) a
(b) present
(c) of simple
(d) food

It （is said） that no potential frontier has （such） fired the imagination or changed the （ingenuity） of humankind （as has） space.

B such后面要接名词

这个……第二句同意选c，因为b中的present也有形容词性，这里可以理解为（that is）present；而c中感觉缺少了定冠词the，应该是one of the simple sugars，单糖的一种。