一、这个题本一共有 50 题，考试时间为 60 分钟。
You have 60 minutes to work on this test. There are a total of 50 test items.
You must indicate your answers ON THE ANSWER SHEET. Answers written on the question booklet will not be graded.
Once the test begins, you may not leave the test room. If you have any questions, please raise your hand. The test proctor will help you.
When the test is over, please put your question booklet and answer sheet on the desk. Please do not leave until the test proctor has collected all of the test materials.