Question

英语选择题（定语从句）！！英语高手请进！！谢谢！5

首先在这里先说明一下情况，因为我的错题是考试的历年真题来的。同时这次的考试对我来说很重要，希望各位前辈能够帮助我，谨慎作答，因为我会完全相信你们的答案的！谢谢！（题目比较多，请不要只对正确答案进行讲解，麻烦将其他的选项的用法等分析清楚吧，怎么区分用法）谢谢！
29.Among all thecontestants, only Mary _____ had supposed could win the first prize.
A.who B. / C. I D. that
--我选了B，答案选C

30.Keep the drug _____ is out ofchildren’s reach.
A. in a place where B.where C. in aplace which D. in which
--我选了B，答案选C
31.Theprice of the food and vegetables _____ we had expected.
A. were a little lower than B.was cheaper than
C. was a little higher, as D.were higher, which
--我选了B答案选了C

32. He arrived in Shanghai in 2003, _____, some time later, he became ateacher.
A.when B. where C. that D. which
--我选了A，答案选B

33. The challenge is to create a system, _____ the farmers can teach the worldabout plant medicine.
A.where B.which C.when D. forwhich
--我选了B，答案选了A

Answer 1

29.I had supposed做mary的定语. 30.定语中不缺状语，缺主语，所以加place,后面是做place的定语。31. than后面只接名词，不接句子。32.一段时间后，他在上海成为了一名老师，而不是2003年成的老师，所以修饰的是地点。33.农民可以在这个系统上向世界教育关于种植医疗方面的知识（呵呵，翻译得好奇怪啊）后面的定语不缺主语和宾语，缺状语。

Answer 2

29题，Mary,是我supposed的人，suppose是I发出的动作。 这句可以是“ Mary could win the first prize.”（I had supposed） 是特指Mary的。因此不能不选的。

32，很明显选地点的啊，因为后面有some time later了，他2003年到达上海，这个过些时候他成为一名老师的....(当然配搭“地方”啦，所以选地点咯。

33.