there are a pen,a knife and several books on the desk.哪错了?

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there are a pen,a knife and several books on the desk.哪错了?

there are a pen,a knife and several books on the desk.哪错了?
there are a pen,a knife and several books on the desk.哪错了?

there are a pen,a knife and several books on the desk.哪错了?
就近原则啊 应该是 there is a pen.