(单选题)

How would most people describe jet hand dryers?

A.They are necessary.

B.They are convenient.

C.They are dangerous.

D.They are traditional.

参考答案：B

参考解析：

细节理解题。根据文章第一段第二句“They are surely very convenient — all we need to do is to hold up our hands for a few seconds until they are dry.”可知，喷射式干手器肯定非常方便——我们所需要做的就是举起手几秒钟，直到它们干了。故选B。

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