【题目】连词成句：falling, the, down, apples, are, stairs, the (.)
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【答案】The apples are falling down the stairs.
【解析】
根据所给的单词，falling从……下来，the这个，down向下，apples苹果，are是，stairs楼梯，the这个，可以组成句子，The apples are falling down the stairs.苹果正从楼梯上掉下来。故答案为The apples are falling down the stairs.