好搞的语法题

I'm puzzled with these exercises and I'm going_______.
1.the teacher's
2.the teachers
3.the teachers's
4.the teachers home
答案 1
教师办公室 the teacher's 后省office
There are____in the picture.
1.two deers and three birds
2.three sheep and four deer
3.four elephants and five sheeps
4.five fishes and six foxes
答案2 为什么 1 不对啊
sheep , deer 单复数同形
He was very strong. People say he had___of three men.
1.strength
2.a strength
3.the strength
4.as strength
答案 3
要用特指
The surroundings of his house______far from clean.
1.are
2.is
3.was
4.has been
答案1
surroundings后跟复数are
The police____everybody at the age.
1.is searching
2.has been searching
3.searches
4.are searching
答案4
The police为复数要用复数动词are searching
Of the new students,sixty____girls.
1.per cents are
2.per cent is