There are as many schools charging under $8,000 a year as those charging over $16,000.
As many schools charge under $8,000 a year as charge over $16,000.
to have done, having done表示动词的先时性,表示该动作先于谓语动词发生,不属于完成时态。如:
Having finished my homework, I went to the park.
A single ancestor is thought to have lived about 140,000 years ago.
of通常修饰无生命物体,也可以修饰有生命物体,如:
名词太长,the works of Marx,engels and Yao
名词定语太长,the name of the student sitting near the window.
‘s通常修饰人,也可以用在dog、bird等有生命推,还可用于时间、距离、国家、城镇、地区、重量、价格、自然现象等.例如:half hour's walk, a mile's distance, Chian's development,a pound's weight.
本题修饰人用了of,因为人后面的定语太长
m