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B. Read and Practice.

variety: many different types of things or people
They do a variety of fitness activities.
tide: the rise and fall of the sea
Here you can see two high and two low tides each day.
replace: 1.to take the place of somebody or something
The factory replaced most of its workers with robots.
2.to put something back in the right place
She carefully replaced the china plate on the shelf.
use up: to finish something
Don’t use up all the milk - we need some for breakfast.
forever: for all time
No one can live forever.

demand: the amount of a product or service that people want
Demand for organic food is increasing.

convert: to change in form or character
The sofa converts into a bed.
absorb: to take something in, especially gradually
Plants absorb carbon dioxide.

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LESSON

C. Go to Part ‘Vocabulary’ of your Workbook and do A and B.

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