Penicillin was an extremely significant medical _________.

• discovery

• inventor

• technique

• device

If you don't _______ your invention, other people may make all the profit out of it.

• design

• create

• patent

• invent

I ___________ him saying he is going to do research about a new element.

• found out

• made up

• heard

• overheard

There's ________ of pipettes and test tubes in this laboratory. We need more!

• an effect

• a lack

• an increase

• a decrease

This phenomenon is ________ in nature.

• complicated

• exact

• sudden

• unique

Researchers are collaborating to ________ the vaccine.

• innovate

• invent

• develop

• figure out

A breakthrough is...

• a method

• a discovery or development

• a drawback

• something obsolete

Cutting edge means...

• something old-fashioned and obsolete.

• the most advanced stage in the development of something.

If you figure out something, you...

• invent something

• investigate something

• do some research about something

• solve a problem by thinking

Telephones became __________ as soon as mobile phones appeared.

• genius

• obsolete

• novelty

• innovation