1 Who is --- principal of your school?

1 Who is ___ principal of your school?
A./ B.the C.a D.an
答案选的是B.然后下面有另一个句子补充上答案后是They elected him captain of the team.同样是职称之前为什么一个加the 另一个不加呢……?不太理解……
2 We consider dogs ____________.
选项不打了.答案选的是“a useful animal”为什么前面是复数后面又用a呢?
3 Which chapter deals with the use of ___________?
A.the noun and the pronoun B.the noun and pronoun
4 The victims of the accident claimed ______ from the insurance company.
A.a huge damages B.huge damages C.the huge damage D.the huge damages
5 _______ will make a trip around the world during the coming Christmas.
A.The Evens B.The Evens' C.The Evenses D.The Evenses'
选C.
.麻烦大家了（= =刚才打错字）