作业帮----- 4000 gold ,silver and pottery artifacts were found .----- When was _____ exactly ----- It was on November 12 ,1990 that the "Nanhai" ship was raised from the seabed .这个空答案是”it" ,为什么不能填”that"?谁能给我讲讲呀?
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----- 4000 gold ,silver and pottery artifacts were found .
----- When was _____ exactly
----- It was on November 12 ,1990 that the "Nanhai" ship was raised from the seabed .
这个空答案是”it" ,为什么不能填”that"?谁能给我讲讲呀?
这是（when is it today?今天是几号?）一样的道理.
it 可以表示时间,天气,距离等.
It's fine.
It's three miles from here to my home.
答案中的it is/was that when/who是个固定句型，表示一种强调。所以提问时要用it。
it代表上面说的整句话，而that不能代表整句话