问题
选择题
Look, there are a lot of students ________ in the sea. [ ]
A. surf
B. surfed
C. are surfing
D. surfing
答案
答案：D
搜题请搜索小程序“爱下问搜题”
Look, there are a lot of students ________ in the sea. [ ]
A. surf
B. surfed
C. are surfing
D. surfing
答案：D