(单选题)

From the passage, we can see that the author thinks the future of the new room key is ______.

A.negative

B.perplexed

C.pessimistic

D.uncertain

参考答案：D

参考解析：

推理判断题。根据最后一段第一句“Yet it is still not clear that virtual keys will do better than previous attempts to beat traditional check-ins.”可知，目前还不清楚虚拟密钥是否会比以前试图击败传统签入的做法做得更好。所以作者认为新钥匙将来的情况是不确定的。negative意为“消极的”；perplexed意为“困惑的”；pessimistic意为“悲观的”；uncertain意为“不确定的”。故选D。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语