"The car of the future will probably run on water." - "__________!" B. How fantastic!

Robots will do most of the housework, __________. B. but

A person who acts in a comedy is a __________. B. comedian

If we plant more trees, the __________ will be fresher. C. air

All of the machines will have a special card __________ . B. to start

If we __________ all the trees, there will be no more oxygen for us to breathe. B. cut off

Many girls and women do __________ to keep fit. C. aerobics

Plant more trees in the schoolyard because they will provide shade and __________ fresher. C. have

Our dream house will use only __________ energy so that we can make the environment clean and green. C. solar

Many products are now helping you __________ your energy bills. A. reduce

It takes a lot of energy to keep food cool, so don't __________ the fridge door open or put hot things inside. C. leave