Many people think that money brings happiness. However, according to Professor Michael Argyle, this is not true. In Britain, we are     1     (rich) but unhappier than fifty years   ago. The USA is the richest country in the world but Americans are not the happiest people in the world.

Professor Argyle has found that very poor people and very rich people are unhappier than those in between. For example, very poor people in     2    developing world live in overcrowded houses without any running water and     3    no electricity. However, there are many millionaires (百万富翁) with     4     (person) problems. A lot of young people     5    get rich very quickly are at risk.

Because of this, a few young millionaires are changing their life styles. Richard Cross, a multi-millionaire computer analyst ( 分 析 师 ) from California is an example. His house     6     (show) no signs of his wealth. There is a small garden   and there only two   cars     7     (park) outside the house. “I want my kids     8     (live) a normal life,” says Richard.

So what can make     9     (we) happy? According to Professor Argyle, you should have one close relationship and some close     10     (friend). You should do a little sport and have a lot of contact (联系) with other people. Other people make you happy, not money!

9 . When a scientist doesn’t know the answer to a problem, he is ________ (ignore). When he has an idea as to what the result is, he is uncertain. And when he is pretty sure of what the result is going to be, he is still in some doubt. (所给词的适当形式填空)