Q.Complete the entences using relative pronouns:who/which/that/where/when1.A mystery is something2.The teacher caught the students3.She went back to the small village4.A dictionary is a book5.I'll always remember the day

Q.Complete the entences using relative pronouns:who/which/that/where/when1.A mystery is something2.The teacher caught the students3.She went back to the small village4.A dictionary is a book5.I'll always remember the day
Q.Complete the entences using relative pronouns:who/which/that/where/when
1.A mystery is something
2.The teacher caught the students
3.She went back to the small village
4.A dictionary is a book
5.I'll always remember the day

Q.Complete the entences using relative pronouns:who/which/that/where/when1.A mystery is something2.The teacher caught the students3.She went back to the small village4.A dictionary is a book5.I'll always remember the day
Q.Complete the entences using relative pronouns:who/which/that/where/when
1.A mystery is something that is difficult to explain.
2.The teacher caught the students who were cheating in the exam.
3.She went back to the small village where he was born.
4.A dictionary is a book which gives the meaning of words.
5.I'll always remember the day when I joined the army.

你的句子不完整啊！根据你写出来的答案应该如下：
第一题that 先行词something 为不定代词只用that
第二题who先行词为人
第三题where 先行词为地点
第四题which/that
第五题when

A mystery is something that we can't understand。
The teacher caught the student who was smokingin the toilet。
She went back to the small village where she grew up.
A dictionary is a book which tells the meaning of the words.
I'll always remember the day when I fist kissed her.

1.which
2.who
3.where
4.that
5.when

1. A mystery is something which/that is unknown to us.
2. The teacher caught the students who cheated in the exam.
3. She went back to the small village where she was born.
4. A dictionary is a book which/that we can look up words in.
5. I'll always remember the day when I came to this school.

1that
2who
3where
4which
5when

1.that
在不定代词，如：something ,anything, nothing, everything, all, much, few, any, little等作先行词时，只用that，不用which。
2.如果students在从句中是作主语成分的话，就用who,
如 The teacher caught the students who are t...

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1.that
在不定代词，如：something ,anything, nothing, everything, all, much, few, any, little等作先行词时，只用that，不用which。
2.如果students在从句中是作主语成分的话，就用who,
如 The teacher caught the students who are talking.
如果是作宾语成分的就用whom
The teacher caught the students whom she just called.
3. 也有两种情况，可以是 she went back to the small village where she grew up
也可以是 she went back to the small village in which she grew up
4.跟2一样，看book在从句中是当主语还是宾语
可以是 A dictionary is a book that teaches us a lot.
也可以是 A dictionary is a book which we can use to help us.
5.情况跟3差不多
可以是I'll always remember the day when I met you.
I'll always remember the day on which I met you.
总的来说，2和4这类题目主要是看先行词在从句中充当的是什么成分，一般来说，当主语用that ，当宾语用which
3和5 这类，主要知识点是 on which=when 先行词是表示时间的
in/at which=where 先行词是表示地点的

最后，百度这里也有一个总结的还可以的http://zhidao.baidu.com/question/72944438.html?an=0&si=3

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1. A mystery is something that... something/anything 等后面接that
2. The teacher caught the students who... 人后面接who
3. She went back to the small village which/that...
4. A dictionary is a book which/that...
5. I'll always remember the day when...

A mystery is something that we can't understand。
The teacher caught the student who was smokingin the toilet。
She went back to the small village where she grew up.
A dictionary is a book which tells the meaning of the words.
I'll always remember the day when I fist kissed her.