it 与there be的用法I.要点1、it的用法(1)用作人称代词,代替前文提到的无生命的事物,动植物、婴儿及指示代词this, that,如,I have a new pen. It is beautiful.The Browns have a new baby. It's cute.(2)...2015-08-21
As we have seen, the focus of medical care in our society has been shifting from curing disease to preventing disease-especially in terms of changin...2015-08-21
Part BYou are going to hear four conversations. Before listening to each conversation, you will have 5 seconds to read each of the questions which...2015-08-21