She is looking for a permanent place to stay.

Are you looking for a temporary or a permanent job?

The disease can cause permanent damage to the brain.

2 describes something that exists or happens all the time: 经常性的；

Mont Blanc has a permanent snow cap.

Our office is in a permanent state of chaos.

4. This group account for nearly 18 percent of the state's population.

这个人群大约占到该州人口的18%(P18)

1). account

account for sth (BE) phrasal verb

to form the total of something: 占比例；

Students account for the vast majority of our customers.

account (BANK) (ALSO bank account)

an arrangement with a bank to keep your money there and to allow you to take it out when you need to: 帐户；

I've opened an account with a building society.

I paid the money into my account this morning.

account (REASON)

on account of sth because of something: 因为、由于

He doesn't drink alcohol on account of his health.

5. So it is not surprising that Florida's Charlotte County is known as the oldest place in the USA. 因此也就不奇怪佛罗里达州的夏洛特县北被认为是美国最老的地方。(P18)

1). the usage of "it"

It is used as a formal subject; the real object of the sentence is that Florida's Charlotte County is known as the oldest place in the USA

相关高考试题：

1.（2006湖南）

As the busiest woman in Norton, she made _____ her duty to look after all the other people's affairs in that town.

A. this B. that C. one D. it

2.（2006浙江）

_______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.

A. As B. That C. This D. It

3.（2006全国I）

If I can help_______, I don't like working late into the night.

A. so B. that C. it D. them

4.（2006山东）

I'd appreciate ____ if you would like to teach me how to use the computer.

A. that B. it C. this D. you

5. (2005全国I/II)

The chairman thought _______ necessary to invite Professor Smith to speak at the meeting.

A. that B. it C. this D. him

6.(2007 天津)

He didn't make ________ clear when and where the meeting would be held.

A. this B. that C. it D. that

7. (2007 山东)

_____________ worries me the way he keeps changing his mind.

A. This B. That C. What D. It

8. (2007 全国卷II)

___ felt funny watching myself on TV.

A. One B. This C. It D. That

答案及解析：1. D 2. D 3. C 如果可以的话；

4. B 5. B 6.C 7. D 8. C