四、综合填空
No one knows when we started using colours，but we think that ancient cultures might use colours 1.
to represent
（represent）specific（特定的）things. People decided what the colours represented — blue in one culture could mean the opposite of that in 2.
another
.
People often choose colours that are new to them. Studies in history suggest that new colours 3.
quickly
（quick）became popular，maybe because they were different. The 4.
first
（one）mass-produced（大规模生产的）cars were all black. When different coloured paint was developed，people chose those colours because they were new. 5.
The
first colour televisions didn't have very realistic（逼真的）colours，but almost everyone 6.
preferred
（prefer）them to black and white ones.
Age influences our choice of favourite colours. Children like the colour yellow. Older people seem to like blue and purple more than red and orange. This kind of knowledge about colours can be 7.
powerful
（power）in advertising and website design. It can have an influence on their 8.
readers
（read）.
Scientists discovered that colours can have a physical（身体的）influence on us. For example，red 9.
is said
（ say）to make our breathing and heartbeat faster. 10.
However
，blue can make our bodies give off chemicals（化学物质）that calm us down.
