Is it good to use FL in teaching of Second Language? What are the most problems Teaching English in Arab countries? What is the most important skill?

The world is a small village, thanks to the development of means of communication, and to be in touch with this world, which comes to us every moment nothing new in the fields of science, technology, politics, economics, education, etc., it was necessary for us to master our language, and then learn a second language, to open up universes closed in front of us, but we aware and knowledgeable about what is going on around us, and to prepare ourselves to cope with and adapt to new developments, in addition to opening up prospects for cultural interaction, which helps in the understanding of the other. So is learning languages ​​is important, but not at the expense of the Arabic language, which is considered the nation's identity and address of its independence, and a pot of culture and civilization.