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chairdeskcarballon在……上in在……里面Itisinthehouse.它在房子里面。under在……下面oninunderWhereistheball？Itisonthedesk.Itisunderthechair.Itisinthebox.adeskIt'sonthedeskIt'sonthechairIt'sinthedeskIt'sunderthedeskIt'sunderthechairIt'snearthedeskIt'snearthechair.inonunderinonunderonthetableunderthetableWhereisthe......?It’s…知识回顾KnowledgeReview祝您成功！