This is the very information__we can learn what is selling best in the market.A.that B.which C.from that D from which 这里可以填that么?不是说定语从句中先行词被 the very 修饰时只能用that么?
He is thought to have acted foolishly.Now he has no one but himself to blame for losing the job.为何用不定式 to have acted 而不用分词 having acted?其中是否还原成It is thought that he have acted foolishly?并且这一类结构后只能加不定式?
The miracle is that what he did in the little space of seventy years could have been done at all, even by a great genius. 请问句中at all不是只能出现在否定句和疑问句中吗?在以上陈述句中怎么理解?