Christmas Miracle with my best friend (please correct my mistakes)

Yesterday, as usual, I woke up early and prepared myself to go to my college. Suddenly, as I was walking down the street, I could hear from far away a girl calling out with a loud voice: "I miss you my friend!" It was my best friend Carla from Poland. "Oh I miss you so much dear! What are you doing here in Norway?" I replied. She told me that she want to give me a big surprise and visit me on Christmas night. Really, that's the best gift I ever had and I will never forget that moment. Thanks.

Letter#8

With reference to your advertisement in X newspaper dated March 1st, 2015, I would like to join your educational group.
Together with this request I am sending four copies of the required certificates.

I am sending with this request the required certificates in four copies.

Will it be OK if I write ''Following to'' instead of '' With reference to'' in the first sentence? - No

Could you correct my mistakes, please? :)

Experts for many years believed that the human population would grow quite surprisingly. However, the speed of this growth might be more surprising than what they thought it would be.
According to the report published by the  Population Reference Bureau, the world population will reach 9.9 billion as of 2050.

Almost 7.6 billion people live in the world today. In that case, when we apply mathematical rules, we can predict that the universal population will be 33% more than it is today in  35 years.
This estimate is larger than the report based on current data from the United Nations who assumed that our population will reach 7.6 billion people at 2050.
There are a few different reasons why world population is growing so fast. One of them is that people are as long-lived now as they have ever been in history because of the progress in and access to health care, nutrutional science and food production.
In the United Nations report, it is also mentioned that the number of people who are at a reproductive age is increasing and that immigration is increasing to more developed areas.

Thanks in advance for correction :)

Hi. I hope I made this how you wanted it to sound and to mean. Bye.

About you

Do you occasionaly write letters?
Do you ever listen to classical music?
Are you always late for appointments?
Do you ever remember friends' birthdays?
Do you regularly go to the theatre?
Do you buy chocolate from time-to-time?

Xmas is coming! My notebook♪04

It's my day off today.
I had my hair cut today.

The hair salon has got a pretty Christmas tree !

Christmas is coming !

I want to see Christmas lights :)

I want to change

I want to learn English well so that I can pass the elite exams, and also talk with foreigners.

Face mask

I love using face masks after taking a bath.
In recent years many products have come out.
Many face masks are cheep and easy to use. You can buy and use them every day.
Today I'm using a face mask that is of a very good quality. 
It moisturizes very well. I feel great!

Hey, I wrote three sentences.

1.I threw my magazine into the waste basket and decided to join in Malaysian life.
2.We should develop environmentally-friendly products to improve air quality.
3.With such a pen, friend, I think I can share with her our traveling experiences, taking care of pets, and whatever we have in common.

There is basically nothing wrong with these sentence, but...

1.I threw my magazine into the waste basket and decided to join in live a Malaysian lifestyle. I am not sure what you want to say here. Is this what you mean?