请教4道语法题

wendybao

21, I will employ the man ______ they say is a fluent speaker of English.
A, who.
B, that.
C, which.
d. whom.

为什么是同位语从句？怎么分析？

32, This is ___________ such a thing.
A, my first time of seeing.
B, my first time to see.
C, the first time I have ever seen.
D, my first time I have ever seen.

B为何不是答案？答案是C, 不时有规则说看到序数词要找不定式吗？

49,“ I did not go to the party.”
“did _____ go to the party?”
a, many john friends.
B, many john’s friends.
C, my sister boy friend.
D, a boy friend of my sister’s.

B为什么不是答案

53, (from the top ) of the tower, Jacob was able ( to clearly and easily see
) the (whole ) city (stretching) out below him.

C怎么改？

consonant

不是TOEFL 题型，谅解

another

为了方便解答与搜索，所以麻烦楼主能按照

【发贴必读】----《语法区版规》提问格式说明★http://forum.chasedream.com/dispbbs.asp?boardID=58&ID=83887&page=1

修改一下标题，谢谢合作哟^_^