1. Who is making so much noise outside? It is the children. 为什么用it is
2.LiMing speaks English well though he didn't go abroad. 为什么though 不可以用even if 来替换?
3. The teacher asked what was the matter when he saw a girl crying suddenly. 句序问题,什么时候是陈述句序,什么时候是疑问句序?
不好意思哈，最后一题呢，不是想仅仅问这个题目的句序问题。是想问比如do you think 等插入语在疑问句中后面跟陈述句序，而这里却是疑问句序的问题。