A large amount of solar energy ________ electrical energy since amounts of advance equipment ________ introduced.
A.was converted into; were B.were converted into; was
C.have been converted into; was D.has been converted into; were
John didn’t come along, ______ making it necessary for us to get someone else to replace him.
A.thus B.anyhow C.besides D.however
People try to avoid public transportation delays by using their own cars, and _____ this creates further problems.
A.in turn B.in brief C.in return D.in all
Tom's wife was saved in the earthquake and he was so grateful that he decided to help some poor children _____.
A.in turn B.in brief C.in return D.in all
—I have watered all the plants in the garden.
—Thanks, Tony, but you _____ then. It’s reported that there will be a storm tonight.
A.couldn’t have watered B.needn’t have watered
C.could water D.needn’t water
_____ the ups and downs in my life, I eventually realized what life was all about.
A.Experienced B.Having experienced
C.To experience D.Experiencing
