The man didn't know ( ) the thief broke into the house and stole all his valuable thingsa:it was when that b:when it was thatc:that it was when d:was it when that

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The man didn't know ( ) the thief broke into the house and stole all his valuable thingsa:it was when that b:when it was thatc:that it was when d:was it when that

The man didn't know ( ) the thief broke into the house and stole all his valuable thingsa:it was when that b:when it was thatc:that it was when d:was it when that
The man didn't know ( ) the thief broke into the house and stole all his valuable things
a:it was when that b:when it was that
c:that it was when d:was it when that

The man didn't know ( ) the thief broke into the house and stole all his valuable thingsa:it was when that b:when it was thatc:that it was when d:was it when that
答案是B,我刚才也确认过了.
it 是 that 引导从句的形式主语.因此真正的主语是“ the thief broke into the house and stole all his valuable things”这句话.
因此that 引导的是主语从句.所以这个that不能省略.
这个句子就是复合从句.
know 后面的是由 when引导的宾语从句.而在这个宾语从句中又套了一个主语从句.
实际上没有简化过的句子就是：
when the thief broke into the house and stole all his valuable things was.
而题目是把the thief broke into the house and stole all his valuable things这一长串用形式主语it来代替.放在了后面,用that来连接,而这个that不能省略.前面已经说了原因了.
因此选的B.这是湖南省长沙市一中2010年的高三月考题.所以答案一定是正确的,选B.
如果还有疑问请继续追问,

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