Do you know _______ World Water Day is?-On March 22nd
问题描述:
Do you know _______ World Water Day is?-On March 22nd
A.when B.where C.what D.which 为啥是when,他不是做时间状语嘛(不做句子成分的吧)?可是is后面缺一个表语啊,
答
从答句可以看出,on the march 22nd,这是时间状语,所以就是when ,该句中,when = on which day