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
I ________ with my grandma because my parents have gone abroad for further study.
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A
stayed
B
am staying
C
have stayed
D
was staying
When hearing the good news, both the child and the mother ______ very happy.
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A
wasn’t
B
were
C
is
D
aren’t
.Don’t worry! You won’t miss her at the airport. She ___a red T-shirt and a white skirt at that time.
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A
has worn
B
will be wearing
C
was wearing
D
wore
–Why do you look so upset? –The electricity was cut off suddenly and my essay _______ unfinished since.
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A
was left
B
has left
C
left
D
has been left
. Why _____ so many money recently? I am bored to see you.
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A
are you borrowing
B
have you been borrowing
C
have you borrowed
D
did you borrow