--ItmustbeTomthatforgottoclosethedooroftheclassroom.--Itmaybe.But

发布时间：2020-08-05 00:04:45

-- It must be Tom that forgot to close the door of the classroom.-- It may be. But he is ________ the last one to leave.A.frequentlyB.occasionallyC.usuallyD.sometimes

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B解析occasionally偶尔；frequently经常地。根据题意选B项。
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