请帮我用定语从句翻译一下这些句子，谢谢了

1 昨天妈妈给我买的那件T恤太小
The T-shirt which my mother bought me was too small.

2 我们要参观几百年前建成的最古老的博物馆
We are going to visit the oldest museum which was built hundreds of years ago.

3 我在回家的路上，遇见了一位在上学时给我很大帮助的朋友
On my way home, I came across a friend who had given me much help in university.

4 他兄弟当中当医生的那个曾出国留学
One of his brothers who is a doctor used to study abroad.
5 每一个对这部小说有兴趣的人，都看过哈利波特这部电影
Those that is interested in this novel has watched this movie.
我是从事英语的，不明再问啦。

1 昨天妈妈给我买的那件T恤太小
Yesterday,the T-shirt which my mother bought is much too small.
2 我们要参观几百年前建成的最古老的博物馆
We are going to visit the library which is built on some hundred-year time and is the oldest .
3 我在回家的路上，遇见了一位在上学时给我很大帮助的朋友
On my way home,I came across the friend who help me a lot when at school.
4 他兄弟当中当医生的那个曾出国留学
His brother who was a doctor have been go aboard for study .
5 每一个对这部小说有兴趣的人，都看过这部电影
Everybody who is interested in novel reads harrypotter.

1 昨天妈妈给我买的那件T恤太小
The T-shirt that my mom bought me yesterday is too small.
2 我们要参观几百年前建成的最古老的博物馆
We're going to visit the oldest museum built several centuries ago.
3 我在回家的路上，遇见了一位在上学时给我很大帮助的朋友
On my way home, I ran into a friend who gave me lots of help at school.
4 他兄弟当中当医生的那个曾出国留学
One of his brothers who is a doctor used to study abroad.
5 每一个对这部小说有兴趣的人，都看过哈利波特这部电影
Everyone interested in Harry Potter books has seen
the movie.

1.the t-shirt that my mother bought me yesterday is too small.

2 我们要参观几百年前建成的最古老的博物馆
we will visit the oldest musume which was built hundreds of years agao.

3 我在回家的路上，遇见了一位在上学时给我很大帮助的朋友
i met a friend who helped me a lot in my studies when i was on my way home.

4 他兄弟当中当医生的那个曾出国留学
one of his brothers who is a doctor studied abroad.
5 每一个对这部小说有兴趣的人，都看过哈利波特这部电影

eveyone who is interested in novels has watched Harry Potter.本回答被提问者采纳

1. The T-shirt which my mother bought me was too small.
2. We are going to visit the oldest museum which was built hundreds of years ago.
3. On my way home, I came across a friend who had given me much help in university.
4. His brother who is a doctor used to study abroad.
5. Everyone who is interested in this novel has watched this movie.