问题补充：
---______did the first man walk on the moon？---In 1969．A.WhatB.WhereC.WhenD.Why
答案：
C
解析分析：对不是指延续概念的时间状语提问时用when(延续概念的用how long)(延伸)what time和when的区别：1)when可以是一段时间(如in 1969)，也可以指一点时间(如at six o'clock)，而what time只能指时间的点，如：When did the first man walk on the moon？ In 1969．(只能用when)What time do you get up every day？I get up at six o'clock every day．此处可以用what time，也可以用at what time(因为此处是指“在什么时候”)，还可以用when．2)what time可以问钟点，如：What time is it now？(此处不能用at what time)，而when不能这么用。不过when可以有这样的问句When is your birthday？My birthday is June 5th．(延伸)注意下面提问的方式：What day is today？Today is Tuesday．What's the date today？Today is February 21st．
