问题描述：
选词填空[aren't are is are isn't ]
[ ]there a desk in your room?
there[ ]a pen,but there is a pencil
how many rivers[ ]there?
[ ]there any mountains?
there[ ]many trees.there is only one.
[ ]there a desk in your room?
there[ ]a pen,but there is a pencil
how many rivers[ ]there?
[ ]there any mountains?
there[ ]many trees.there is only one.
问题解答：
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