阅读理解。 You've attended all the classes,done all of your homework and you think you have grasped the material.But then the day of the test comes.Suddenly,you feel so nervous that you can't answer those questions you knew the answers to just last night.If this sounds like you,you may have a case of test anxiety (焦虑)． Test anxiety can be a real problem. When someone is stressed out over a test,he or she may not be able to do his or her best work.Feeling ready to meet the challenge,though,can keep test anxiety at a proper level. Use a little stress to your advantage. Stress is your body's warning mechanism (装置)-it's a signal that helps you prepare for something important that's about to happen.Instead of worrying too much about the test,take  an active way.Let stress remind you to study well before a test.Then you'll stop your stress from being out of control. Ask for help. Although a little test anxiety can be a good  thing,too much of it is another story entirely.If sitting for  a test makes your mind go blank and causes you to miss answers that you know, then your level of test anxiety  probably needs some attention.Your teacher,your parents,or a tutor can be a useful resource to talk to if you always get too much test anxiety. Be prepared. Many students find that thei r  test anxiety is  reduced when they start to study better. It works-the better you know the material,the more confidence you'll have. 1.What is this passage mainly about? A．What should be done before a test. B．How to deal with test anxiety. C．What causes test anxiety. D．What test anxiety is. 2．The underlined word ' grasped ' in Paragraph 1 probably means________. A．received B．passed C．understood D．finished 3．From Paragraphs 2 and 3 we can learn that________. A．it's hard to keep test anxiety at a proper level B．test anxiety cannot be avoided C．only lazy students have test anxiety D．a little test anxiety might be helpful 4．In Paragraph 4,the writer suggests a student who feels too nervous before a test should________. A．find a quiet place to relax for a while B．talk to someone to get over the anxiety C．have a good time with some friends D．find out if others feel the same 5．What can we infer from the passage? A．Test anxiety is a kind of serious illness. B．Getting prepared can reduce test anxiety. C．Only teachers can help students get over test anxiety. D．The more tests a student has,the less anxiety he/she will have.