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.
A. had affected
B. is affecting
C. affected
D. will affect
网友回答
A. had affected
(答案→)B. is affecting
C. affected
D. will affect
解析：因为全球变暖是现在人类面临的有待解决的客观问题。现在进行时态在句中表示渐进的意味。