INVENTIONS AND DISCOVERIES (LESSON 13)

The elevator is currently ___ order.

• out of

• in

• on

• by

___, we finished the project after many delays.

• At last

• By chance

• In the end

• In my opinion

I met the inventor completely ___ chance.

• by

• on

• in

• with

___, this experiment proves the theory.

• In the end

• At last

• In the future

• By chance

___, machines will be smarter than us.

• In the future

• In the end

• On the future

• By chance

___, science is more important than ever.

• In my opinion

• By my opinion

• At my opinion

• Of my opinion

The ___ water was too hot to touch.

• boiling

• boiled

• boiler

• boil

Can you ___ some water for tea?

• boil

• boiling

• boiled

• boils

The ___ broke, so we couldn't heat the water.

• boiler

• boiling

• boil

• boiled

She works as a ___ in a lab.

• chemist

• chemical

• chemistry

• chem