题目

Whenever the exam season comes, stress（焦虑） may come along. Here are some_______that helped me and my friends through this season.When the stress of exams is really hitting me, I stop and take a walk. I usually borrow m neighbor's dog and_______for about fifteen minutes. Many boys would simply choose to run for a while, or play ball games. Having some_______ drives away your stress easily most of the time.And_______you find music helpful, give it a go. Listening to your favorite songs will surely make you_______. The best thing about this is that you don’t have to go_______But if you 已知，且∥，则的值是（     ） A．          B．          C．              D．