问题补充:
With so many people the Internet, it is difficult to see online movies at the same time.
A. surf
B. to surf
C. surfing
D. surfed
答案:
A. surf
B. to surf
(答案→)C. surfing
D. surfed
解析:此题考查的是with 的复合结构,so many people 与surf 之间是主谓关系,surfing表示主动进行,因此选C。