____________ is a colorless, odourless, non-toxic, but flammable natural gas.

Keeping all the lights on in your house all day will ____________ a lot of electricity.

I had to call a professional to _____________ my air conditioner.

When the fire alarm went off, we had to quickly ___________ the building.

Steel will often _________ at around 1370 degrees celsius.

This is a ________.

This is a refinery _________.

__________ is another word for danger.

This is an __________

_________ is used to make roads

A mask or a respirator can protect you from toxic _________

_______________ form the basis of crude oil, natural gas, coal, and other important energy sources

The _____________ took many months, but eventually the team located an oil reservoir deep underground.

A _______ is used for lifting extremely heavy objects.

__________ come in many shapes and sizes.

When my car battery died, I had to __________ it with a new one.

To be awake and aware, is to be ________________.

____________ is another way of saying 'wait for further instruction'.

A ____________ product is a copy or imitation of a natural product.

We all have a ______________ to promote safe working conditions.