We recycle  rubbish, so why not language? Recycling language means using vocabulary that you have learnt before again and again. However, unlike rubbish that piles up in our environment, if we do not recycle language, we simply forget it. So how do you recycle language? There are basically three ways to do it. The first is through reading. Go back to your favourite articles and read them once more. Just reread them and do not worry about each vocabulary item. If there are some that you are not sure about, make a guess and you will probably guess right. The second way to recycle is through writing. Look at some of your favourite articles and write either a short paragraph or a few sentences in your own words. After you have done this a few times, go back and read through what you have written, checking vocabulary functions. Don't worry if you have made mistakes. That's how you learn. The third way to recycle language is by having an imaginary chat with yourself about your favourite articles at home. You can pretend there is someone with you who speaks English and tell him what you are thinking about or how you feel. According to the passage, recycling language means   _  .
repeating vocabulary at times revising vocabulary at a proper time learning new vocabulary as much as possible using vocabulary that we have learnt very often