Writing Project B

I'm sorry miss, I so late to doing work 3, because in my village there is no signal, so I'm not able to do as soon as possible. I try to find grammatical error in work 2 from my friends' work. I just find less because I'm also not very clever to correct them. There are :

From group 9 
1. On simple past tense
the sentence is "I bought many clothes to my family." I think this sentence will be more correct if they are written " I bought many clothes for my family".
And then on sentence "She brought a book at the library yesterday." will be more reasonable if they are written " She borrowed a book at the library yesterday", because someone who go to library usually want to borrow a book or some books.

2. On present continuous tense
The sentence is "Listen! The headmaster is announcing about the independence day." I think the independence day should be written use capital characters on the start characters, like this "the Independence Day". It's better because we have to respect for historic day of a country.

3. Past perfect and past tense
On this sentence, they have a mistake. "Fauzy had sent me a email before he called yesterday. They should use "an" in front of email, not "a", because the word is started by vocal characters. Also I agree with Asmara's comment, this sentence is haven't object. So the correct sentence is " Fauzy had sent me an email before he called me yesterday.".
On sentence "I known you after I had met with your family." the correct sentence is"I knew you after I had met with your family."

For group 11
1.  "Miss Uut was walking when we submitted our exercises on her table." I think the correct sentence is
"Miss Uut was walking while we submitted our exercises on her table."

It's from me Miss, if I have many mistake please explain in the next meeting in order I can  know my mistake and I'm able to write correctly. Thank you Miss:)