请英语高手帮我分析题目...请把我的问题复制下来,在每个问题的后面回答正确的答案,详解下,也就是告诉我涉及到的语法知识或

请英语高手帮我分析题目...
请把我的问题复制下来,在每个问题的后面回答正确的答案,详解下,也就是告诉我涉及到的语法知识或者固定用法.
2.It _C____ to the airport.
A.takes forty minute's drive to get B.takes forty-minute drive to get
C.is forty-minutes' drive D.is a forty-minute drive
3.It is reported that __C____ schools are improving their IT environment.
A.a great many B.a great deal C.a large amount of D.a large part of
4.His attitude to us is __D___ of a comrade.
A.one B.it C.that D.those
5.One of the students hasn't prepared _A___ lessons very well.
A.one's B.ones C.their D.his
6."How many elephants did you see?" "__B___".
A.None B.No one C.Not many ones D.No many
7.Biology is __A___.
A.science of life B.science of the life C.the science of the life D.the science of life
8.There are ten boxes on the desk and the __B____ is yours.
A.nine B.nineth C.ninth D.forth
9.____C__ was done by the girl students.
A.One three of the work B.One third of the works
C.Two third of the works D.Two thirds of the work
10.Which of the following is wrong?
This book is easy enough for ____A__.
A.a six-year-old child B.a child of six years old
C.a child aged six D.a six years old child