He has made so many mistakes in his essay that he ________ do it all again.
A.ought
B.has to
C.needs
D.used to

The Internet is a very fast and convenient way for people to_____ information.
A.get
B.make
C.achieve
D.do

The government has______ measures to promote the development of the economy.
A.made
B.achieved
C.carried
D.taken

_________(1)
A.had
B.started
C.was
D.invented

_________(2)
A.to
B.in
C.for
D.about

_________(5)
A.or
B.so
C.and
D.then

_________(6)
A.who
B.whom
C.whose
D.they

_________(8)
A.who
B.that
C.whom
D.whose

_________(10)
A.since
B.later
C.again
D.then

What does the passage primarily discuss?
A.Advantages and disadvantages of solar energy.
B.Solar energy’s advantages over other sources of energy.
C.The cost of solar energy.
D.Solar energy as an alternative for fossil fuels.