练习：从A、B、C、D四个选项中，选出可以填入空白处的最佳答案。
1 . I still remember the day ____ I first came to the college .
高一英语第八单元Food Around The World (世界上的食物)由www.yf1234.com收集及整理,转载请说明出处www.yf1234.com
www.yf1234.com A . on which B . in which C . at which D . which
2 . They wll never forget the day ____ they got married .
A . that B . which C . in which D . when
3 . He makes good use of the time ____ he can spare .
A . when B . that C . in that D . in which
4 . The factory ____ his mother works is in the east of the city .
A . that B . which C . on which D . where
5 . The place ____ interested me most was the Children\'s Palace .
A . which B . where C . what D . in which
6 . That is the reason ____he wasn\'t here yesterday .
A . why B . which C . on which D . in which
7 . That is the reason ____ he can\'t say .
A . why B . that C . what D . in which
答案与解析：
1 . A on which 可用 when 代替，在定语从句中起时间状语的作用。 2 . D 关系副词 when 在从句中作时间状语，可用 on which 代替。 3 . B 关系代词 that 在定语从中作及物动词 spare 的宾语，可用 which，也可省略。 4 . D 关系副词 where 在从句中作地点状语，可用 in which 代替。 5 . A 关系代词 which 在从中作主语，可用 that 代替。 6 . A 关系副词 why 在从中作原因状语，可用 for which 代替。 7 . B 关系代词 that 在从句中作及物动词 say 的宾语，可用 which 代替，也可省略。
● 谈谈被动语态的三种特殊情况
主动语态变被动语态的“三步曲”是：一、将主动语态的宾语变为被动语态的主语；二、谓语动词改为被动形式；三、如需强调动作的执行者；用介词 by 引出。那么，下面的三个问题也值得我们重视。
一、不可变为被动语态的主动语态
1 . 宾语为抽象名词或处所名词。如：
She always worries about her health . 她总是担心她的健康。
His friends left Beijing by train yesterday . 昨天他的朋友们坐火车离开了北京。
2 . 宾语为反身代词或相互代词。如：
They are teaching themselves English . 他们正在自学英语。
We should learn from each other . 我们应该互相学习。
3 . 宾语为行为者身上的某部位或某器官。如：
At last he put his hands up .
4 . 宾语为表示某组织机构的词组。如：
His father joined the Party two years ago . 他父亲两年前入了党。
5 . 谓语部分为一个不可分割的动词短语。如：
Then he made faces and jumped like a monkey . 接着他做鬼脸并象猴子一样地跳。
二、常用主动语态表示被动意义的动词
英语中有一些动词，常和表示行为方式的状语连用，可以用主动语态表示在逻辑上似乎应该用被动语态表示的概念。如：
This pen writes well . 这笔很好写。
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高一英语第八单元Food Around The World (世界上的食物)