2. 外语
  3. With all your brains you______the math test, but you failed. You were too careless.

With all your brains you______the math test, but you failed. You were too careless.

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问题 With all your brains you______the math test, but you failed. You were too careless.
选项 A、should pass
B、should have passed
C、must pass
D、must have passed
答案B
解析 should+完成时：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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