Composition. Answer to a classmate

I haven't got a clue about how to improve my listening skill. What do you suggest me to do? 

As it is one of the most common difficulties English learners face, I suggest that you take a proactive approach. For instance, every moment to spare you have you should be exposed to English. You could turn on the radio in English, watch series in English with English subtitles or listen to the ever-reliable BBC learning English programs.

Improving your listening skill requires a lot of independent effort so you must actively look for opportunities to get familiar with English.

It would also be invaluable to listen to contents you are interested in. That has a series of pros and cons. Some contents might be hard to come by, or your lack of some vocabulary could kick in but, in a while, understanding English  will become second nature. (129)

I would like to have a hope of passing my oral exam, but I don't feel confident while speaking in the exam. Words don't come to me naturally. What can I do? 

For those who get cold feet when oral exams are looming, I would suggest activities such as recording yourself giving previously prepared speeches or reading aloud all the books under the sun.

It would also be a help to find a method in the madness and work out a timetable leading up to the exam.

As you are taking the C1 oral exam you need to top up your English vocabulary, otherwise you won't have a wide range of knowledge.

Regarding the exam day make sure that you get a good night sleep and feel confident. All of a sudden, if you are relaxed, you will breeze through the exam.