1. My son is 7 years old, he can speak mandarin. 
2. My sister can speak mandarin. 
3. Can you write in Chinese characters? 
4. My friend can speak Chinese but can't write it.
5. Many people can't read Chinese characters.

1. My son is seven years old, he can speak Chinese.
2. My older sister can speak Chinese.
3. Can you write Chinese characters?
4. My friend can speak Chinese, cannot write Chinese characters.  
5. A lot of people cannot read Chinese characters.

my son is seven, he speaks chinese
my older sister speaks chinese
can you write chinese characters?
my friend can speak chinese, but can't write characters
lot's of people don't study characters

1. My son is seven years old, he can speak Chinese.
2. My older sister can speak Chinese.
3. Can you write Chinese characters?
4. My friend can speak Chinese, but cannot write Chinese characters.
5. Many people cannot read Chinese characters.

1. My son is 10 years old, he can speak Chinese.
2. My older sister can speak Chinese.
3. Can you write in Chinese?
4. My friend can speak Chinese, but can't write in Chinese.
5. Many people can't read Chinese.

well done!

1. My son is 7 years old, he can speak Chinese.
2. My older sister can speak Chinese. 
3. Can you write in Chinese?
4.  My friend can speak Chinese but cannot write in Chinese.
5. Many people cannot read chinese.

1. my son is 7 years old he can speak chinese.
2. my older sister can speak chinese
3. can you write chinese
4. my friend can speak chinese but can not write chinese
5. alot of people can not read chinese.

correct 

1. My son is 7 years old, he can speak Chinese. 
2. My older sister can speak Chinese.
3. Can you write Chinese characters?
4. My friend can speak Chinese, but not write Chinese characters. 
5. Many people cannot read Chinese characters. 

correct

1. My son is 7 years old, he can speak Chinese.
2. My older sister can speak Chinese
3. Can you write Chinese characters?
4. My friend can speak Chinese, but not write it.
5. Many people cannot speak Chinese.