淬火钢适宜的硬度测试方法是（）。A.HRC B.HB C.HV

If you have decided to take some English courses in the UK, there are some exams that you have to take to determine which classes you should be taking. The first exam that you have to take is the Key English Test, which determines how well you can handle speaking English on a day-to-day basis along with written English skills.
The KET has three parts. They are the basic reading and writing test, the listening exam and the speaking exam. Once you have passed this, you can take the PET exam, which stands for the Preliminary English Test. This test is just for people who already have both basic oral and written skills.
If you can read such items as newspapers, signs, magazines and books, you may be ready to take the next step. Try practicing your writing skills as well and when you think you have good enough writing skills, take this test. There are three sections to this test, the reading, writing and spoken English comprehension skills.
Once you have successfully passed the PET test, you can then move on to the more advanced classes and tests, like the FCE, which is the First Certificate Exam. This exam is harder and more advanced than the other tests. If your job depends on English speaking or writing, then this test is a must to pass. You will need to have passed the last two tests in order to take this one. You will also need to have more of a background when it comes to the English language. By passing the FCE, you have showed that your English speaking ability is of high level.
信息要点:

小题1:    to be taken	Details
The KET (the Key English Test)	This test contains      小题2:     , the listening exam and the speaking exam.
The PET (the Preliminary English Test)	This test contains      小题3:     parts: the reading, writing and spoken English comprehension skills.
小题4:    (the First Certificate Exam)	This exam is     小题5:     of all the tests.