-Tom wants to stay up and watch an old movie on TV.

题目

-Tom wants to stay up and watch an old movie on TV.
-Ten o'clock is ----for a boy of his age to stay up. A too late hour B too late an hour C a so late hour D very much late an hour选B为什么帮我翻译一下第二句an hour是什么

答案

对于一个他这样年纪的小男孩儿而言,十点钟才睡太迟了.
AN HOUR 是指“这个钟点”