British adventurer and swimmer Lewis Gordon Pugh became the first person to swim in the icy waters of North Pole，to raise awareness of how global warming ______ the polar ice cap.
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A
had affected
B
is affecting
C
affected
D
will affect
推荐题目
According a recent survey, if the factory closes, a lot of people _______ their jobs.
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A
are going to lose
B
will lose
C
may lose
D
are about to lose
Going on holiday not only __________you feel good while you’re there --- you reap the health benefits for months, new research shows.
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A
have made
B
make
C
has made
D
makes
A left –luggage office is a place where bags _____ be left for a short time, especially at a railway station.
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A
should
B
can
C
must
D
will
Before the first nonstop flight made in 1949, it_____ necessary for all planes to land for refueling.
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A
would be
B
has been
C
had been
D
would have been
We all agree that the young boy’s brave act _____ the highest praise.
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A
reserves
B
deserves
C
survives
D
serves