***** NOT A TEACHER *****
You have written a very nice paragraph. I should, however, make a few changes:
For example, my friend John majored in Arabic, but he was unable to secure employment, for there is not much commerce
between Egypt and South Korea. On the other hand, after he studied English and earned a certificate in business, he
was able to secure a good job. In other words, having a variety of skills ensures success in obtaining employment.