From facts, scientists have ________ that more energy is being absorbed from the sun, throwing the earth’s energy “out of balance”．

confirmed

concluded

concentrated

centered

The ________, I think, he drew from his simple experiment is not scientific．

charge

conclusion

promise

relation

A lot of new machines were ________ to the factory．

equipped

provided

made

bought

The bird ________ its wings and flew away．

spread

expanded

extended

scattered

Parents should ________ their small children ________ rivers．

keep; away

keep; away from

keep; off

keep; out

The terrible flood ________ several days’ heavy rain．

resulted

resulted in

resulted from

caused

It is a fact that applause reacts ________ a speaker．

to

on

upon

B or C

When ________ to a high enough temperature, water can change into vapor．

heating

being heated

heated

having heated

My remarks ________ at you at all．That is to say, I didn’t aim my words ________ you at all．

didn’t aim; to

doesn’t aim; on

were not aimed; at

were not aiming; for

He ________ his father’s influence by running away．

reacted to

reacted with

reacted by

reacted against