Theressomeoneknockin的知识精选

There'ssomeoneknockingonthedoor.Who
问题详情:There'ssomeoneknockingonthedoor.Who_____itbe?—ItmustbeMary.Shepromisedtobehereat8:00A.must  B.need   C.shall   D.can【回答】D知识点:情态动词题型:选择题...
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