◎ 题干

Passengers on board aren't allowed _____ calls during take-off.
A.making or receivingB.to make or receive
C.to have made or receivedD.having made or received
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Passengers on board aren't allowed _____ calls during take-off.A.making or receivingB.to make or receiveC.to have made or receivedD.having made or received…”主要考查了你对  【现在分词的被动式】【现在分词】【不定式的被动式】【过去分词】  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。