People are using more and more natural gas, wind and other forms of ____

People are using more and more natural gas, wind and other forms of _____.

#6081

energy

force

power

strength

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----Where is Mary?   ----At ____.

#7068

Mr. Brown's

the Browns

Mr. Browns

the Mr. Browns'

Look!There ____ a pencil and three note-books on the ground.

#7353

has

were

have

At the end of an hour’s play, the ________ lay definitely with the home team.

#5949

profit

favor

benefit

advantage

All that can be done ____.

#7348

has been done

have been done

have done

has done

It is widely accepted that animals learn to do things because their certain acts lead to _______.

#6274

rewards

prize

awards

results

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