题目内容
Test takers _______ remain in their seats until all the exam papers have been collected.
- A.can
- B.could
- C.shall
- D.would
shall作情态动词用于第二、三人称时，表示“许可、允诺、命令、强制”，shall在该句中表“强制”。
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| The latest reform in testing is the computerized test.Test questions and answer choices are presented on the __1__.Before the actual test begins, there usually is an instruction showing how to use the computer to __2__ to the questions.Scores are displayed on the screen at the end of the test so that a student has __3__ feedback rather than having to return several days later for __4__. Some computerized tests are "adaptive". This means that a test question is __5__ from a large po  olof items based on how the test taker has responded to the __6__ question.The first question presented is of medium difficulty.If the test taker answers __7__, the next item will be more difficult.If he or she answers __8__, the next question will be easier.The computer __9__ questions by level of difficulty and many other factors.In this way, the questions are "adapted" to find the true skill __10__ of the test taker. Among all the __11__ of computerized testing, there are som  e __12__.No longer can you have a quick look at the __13__ test, answer the easy questions first, and come back later to finish the __14__ ones.Test items are presented one at a time.Once you have confirmed your answer, you cannot go back to __15__ it if, later on, you realize that your answer was wrong. | ||||
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