Please help! I am going to be hired in an international company and I need to refresh my English!!?

You can just surf any website. Just type the key word: "job interview" then everything will appear on screen. Pick the right choice. Make sure that you're comfortable on what you have chosen! Express yourself! Be confident! Maintain eye-contact when answering questions during the interview process! Good Luck!

Forget the Internet. No matter where you live, there is bound to be at least one social group of English-speaking people who get together just because they speak English. These people are usually not in their element, and will therefore love the chance to "teach" you and help you improve your English. Contact the local U.S. or British consulate for help in finding these groups, or do a Google search.

not on internet but go to spoken English classes although it may be a less time for you

Your ? show no flaws. There are numerous sites for learning english, try the search engines.

You can go to ask.com, type any word or language and find out what it is.