Ⅰ.用适当的关系代词或关系副词填空
1．I have bought two pens，neither of ________ writes well.
2．I often thought of my childhood，________ I lived in that old small town.
3．Tom’s pet became ill and died，________ made him very sad.
4．2008 is the year ________ the Olympic Games were held in China.
5．He has three brothers，two of ________ are doctors.
