They tend to improve life for many people. But they put other people's nose out of joint. Computers have made millions redundant. But they have also created whole new industries.
a sex toy
They are good
They were good.
Yes!
Your brain, usually.
he was famous for his good inventions
Yes. You have to be good at mathematics to be good in science and inventions.
there are no good effects.
at school.
Yes
There are no good effects. So get owned!
good effects of metals