output is (now six times )______it was before 2000.
可以把括号里面的先扣掉
这里缺少一个 引导词 引导表语从句,在从句中做表语成分
只能选 what
that how 不做句子成分,which不能引导表语从句
output is (now six times )______it was before 2000.
可以把括号里面的先扣掉
这里缺少一个 引导词 引导表语从句,在从句中做表语成分
只能选 what
that how 不做句子成分,which不能引导表语从句