将下列两个简单句合并成带定语从句的复合句

将下列两个简单句合并成带定语从句的复合句
1 the bridge has been rebuilt now.it was built in 1959.
2.she is going to the town .i do not konw the town.
3 he did not attend the meeting.he told me the reason.
4 the train started at 4:50p.m.i missed it.
5 the medicine was quite helpful.Dr.Li gave him it
6 the nurse is very kind.she looks after my little brother.
7 the play was very interesting.we saw it the night before.
8 the plane was late .it was going to tibet .
9 the student studies very hard .her father is a worker.
10 he is the most careful boy.i konw him.