重点15 无人称代词it的用法1) 指代时间、距离、自然现象等例句：Its a lovely day isnt it? It was very cold today. Its a long way to go.What time is it ? It s half past eleven.2) 指代前面所提到的人或事物，或指代说话双方都熟悉的人、婴儿等。例句：Who is knocking at the door? Its me.Sorry I am late again . It doesnt matter. Thank you. Dont mention it.3) 作形式主语或形式宾语，而把真正的主语或宾语放在后面，真正的主语或宾语往往是从句，动名词、不定式等。例如：例句：He found it not easy to learn a foreign language well.We think it no good reading in bed. I think it necessary that we have a meeting.It is said that all of them have gone to the cinema.It is no use trying to persuade him.It is well-known that China has the largest population in the world.4) it 用于虚指，尤其是表示喜好、憎恶的动词，如;enjoy, like, love, dislike, hate, see to后，即这些动词后面的宾语从句前要加 it.例句：I hate it when people speak with their mouth full.I will appreciate it if you can help me.Please see to it that you bring enough money when you go out.练习：1)Do you like _ here? Oh ,yes. The air, the weather, the way of life. Everything is so nice. A. this B. these C. that D. it2) I prefer a flat in Inverness to _ in Perth, because I want to live near my Moms. A. one B. that C. it D. this3)_ is our belief that improvements in health care will lead to a stronger, more prosperous economy. A. As B. That C. This D. It（浙江）4) Cars do cause us some health problems_ in fact far more serious _ than mobile phones do. A. one B. ones C. it D. those2