初二英语题。急。

改同义句：
1. He began to play the piano when he was 5 years old.
改：He began to play the piano (at)(the)(age)(of)(five).
2. We often see him read English loudly in the classroom.
改：He is often (seen)(to)(read) English loudly in the classroom.
3. I wonder how I can solve the problem.
改：I don't know how to solve the problem.
4. The story happened three years ago.
改：The story (took)(place) three years ago．

翻译句子：
1. 如果我要参加慈善义行我需要注意什么？
译：What do I (need to pay attention if I would like to take part in charity activities)?

2. 如有必要请带好电脑。
译：(Please bring with you the computer) if (necessary).

3. 带好地图和一部手机是很明智的。
译：It's (very wise) to (take the map and a mobile phone).

4. 在行走的时候，你必须要喝许多的水。
译：You need (to drink plenty of water when walking).

5. 还有其他的您要告诉我的吗？
译：(Is there anything) that you need (to tell me)？

6. 帮助别人学英语是件很快乐的事。
译：It's (a pleasure to help) others with their English。

7. 每天完成作业很重要。
译：(It's important to) finish our homework everyday.

8. 在中国西部，一些孩子无法上学，这是在是件悲哀的事。
译：It is really sad that some children can’t go to school (in western China).

9. 对于我们来说学好英语有必要。
译：(It is necessary for us to) learn English well.

He began to play the piano when he was five.
He is often reading English loudly in the classroom.
The story took placethree years ago.

since his 5 years old
reads
I wonder how I can work out the problem.
The story began since three years ago．
What do I need to pay attention to if I want to participate in a charity row ?
Bring your computer if it is necessary.
It's wise to take a map and a mobilephone.
You need to drink alot of water when you're walking.
Anything else that you need to tell me?
It's a pleasure to help others with their English.
It's important to finish our homework everyday.
It is really sad that some children can’t go to school in the west of China.
It' necceceray for us to learn English well.

He began to play the piano when he was 5 years old.
He began to play the piano since he has been 5.

We often see him read English loudly in the classroom.
He is often seen to read English loudly in the classroom.

The story happened three years ago.
The story took place three years ago．

如果我要参加慈善义行我需要注意什么？
What do I【 pay attention to when I take a part in a charity function, 】？
如有必要请带好电脑。
【 Place take a computer with you 】if【 necessary 】。

带好地图和一部手机是很明智的。
It’s【 wisable 】to【 take a map and a telephone with you 】。
在行走的时候，你必须要喝许多的水。
You need【 drink a lot of water when you are walking 】。
还有其他的您要告诉我的吗？
【 Is there still something 】that you need【 to tell me 】？
帮助别人学英语是件很快乐的事。
It’s【 glad to help 】others with their English。
每天完成作业很重要。
【 It is important to 】finish our homework everyday.
在中国西部，一些孩子无法上学，这是在是件悲哀的事。
It is really sad that some children can’t go to school【 in the west of China 】。
对于我们来说学好英语有必要。
【 It is necessary for us 】learn English well.