Why is the man nervous?

W: Come on．Will you please stop biting your nails?
M: Sorry, I just can’t help it．
W: But it’s annoying．
M: I don’t mean to annoy you．I feel so nervous．
W: Why?
M: I feel nervous every time I take examinadons．
W: Just relax．I used to feel the same way, but now I can handle exams easily．
M: How do you make it?
W: Well．I attended some lectures on taking exams．
M: That works? What’s the importance?
W: Well．you should know that you’ve been working really hard．And the most important thing is that you should know that the world wouldn’t end if you fail．
M: Ok．I’ll have a try and see if it works．