Inventions and discoveries (review)

It's not a(n) ... experiment. In fact, it's realy simple.

Each person's fingerprints are ... . No two people have the same fingerprints.

Do you know who ... the planet Mars?

You need at least three people to ... this machine safely.

I'd like to find ... more about being a computer programmer.

... the TV off. This show is borring.

In my ..., people will never live on other planets.

Alexander Fleming discovered penicillin by ... . He didn't expect to find it at all.

His lessons were alway ... .

I can't remember exactly why we need this ... .

I have an idea ...

Disconnect your PC ... the power supply before you take the case off.