◎ 题干
_____ is no doubt ______ you have to remain seated and fasten your seatbelt before the plane lands.
A.There; whether B.It; that C.There; that D.It; whether
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“_____ is no doubt ______ you have to remain seated and fasten your seatbelt before the plane lands.A.There; whetherB.It; thatC.There; thatD.It; whether…”主要考查了你对  【therebe句型】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。