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单选题
With all your brains you _____ the math test, but you failed. You were too careless.
A
should pass
B
should have passed
C
must pass
D
must have passed
参考答案
参考解析
解析：
句意：你这么聪明，本应该通过数学考试的，却失败了。你太粗心了。考查情态动词的用法。should＋完成时表示应该做的事情而没有做。must＋现在完成时表示对已发生的事情的一种肯定的猜测。should do应该做；must do必须做。
句意：你这么聪明，本应该通过数学考试的，却失败了。你太粗心了。考查情态动词的用法。should＋完成时表示应该做的事情而没有做。must＋现在完成时表示对已发生的事情的一种肯定的猜测。should do应该做；must do必须做。
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