learner english dictionary

My friend applied for immigration in Canada. They already paid the initial down payment and still have to accomplish other requirements. He has to take an English exam as part of the requirements given to him. I advised him to buy a learner english dictionary and watch active learning English in television. This is to help him get familiarize with the words especially on how it is pronounced. I told him not to take the exam unless he is really of it because it is quite expensive.