问题
选择题
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
答案
答案：B
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。