【单选题】【消耗次数：1】
John’s score on the test is the highest in the class; he ____ last night.
①
must study
②
should have studied
③
must have studied
④
is sure to study
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随机题目
【单选题】
单位总会计师应当具备的条件之一是（ ）。
①
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②
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