把下列句子合并为含有定语从句的复合句

1、My brother will never forget his teacher who taught him English in junior high
2、We are going to see the tiger which has been ill recently
3、The bike which I have had for five years is good.
4、The dictionary whose cover my sister has spoiled is my favourite.
5、He sold his car which often broke down on the way yesterday.
6、Don't get too close to the house whose roof is under repair
7、They started a literary club in which they often talk about their favourite poets and poems
8、I have a schoolmate who has an extra drawing class per week
9、All the homework that is in Engish is a bit challenging for my brother.
10、Kate Jones hosts a radio club which /that often broadcasts some special messages

6. The letter I received yesterday is from my sister. 7. The play We saw last night.was wonderful. 8. The train that / which was going

1、my brother will never forget his teacher who taught him English in junior high.
2. we are going to see the tiger which has been ill recently.
3. the bike is good which/that I had for 5 ...