有几道英语定语从句的不懂选呢.

有几道英语定语从句的不懂选呢.
1.Janet,_____ is in my class,is atalented singer and dancer.
a.the brother of hers b.the brother of whom
c.her brother d.whose brother
2.The company has developed a newlaptop computer ____ will make it attractive to students.
a.whose low costs b.the same low costs
c.such low costs d.such low costs as theirs
3.My sister,_____ at my house lastyear,is working as a receptionist at a clinic now.
a.as you met b.that you met c.you met whom d.whom you met
4.Thousands,_____ were from thesurrounding towns,came to watch the match.
a.of those many b.many of whom
c.many of those d.who of many
5.The vote was then taken,with thesame result ______.
a.like previously b.that was previously c.previously as d.as previously
6.There is a leather suitcase,_____is broken,in the storeroom.
a.the handle of which b.the handle of that
c.the handle ofits d.its handle
7.We met the man _____ onanimal-life has received worldwide recognition.
a.the book of whom b.whose book
c.the book of his d.whose book is
8.It was the only thing _____ underthe circumstances.
a.which I could do b.as I could do
c.I could do that d.that I could do
9.He returned with tobacco,matches,and _____ were needed.
a.those provisions as b.the same provisions as
c.such provisions as d.those provisions such as