is there a pen and some books on the desk?肯定回答是yes,there is ?还是yes there are

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Yes，there is。
因为提问前枝郑敬用丛升的是is。猛慎
所以回答也要用is。
其它的一样。
像用does提问的，回答就要用does。

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当然是 Yes there is.喽

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yes,there is

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yes,there is

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