—I saw Lucy and her boyfriend in the park at nine yesterday evening.
—Impossible.She________the Internet with me in my home then.
A．surfed B．had surfed
C．would surf D．was surfing
—I saw Lucy and her boyfriend in the park at nine yesterday evening.
—Impossible.She________the Internet with me in my home then.
A．surfed B．had surfed
C．would surf D．was surfing
D
考查时态。根据对话内容可知，昨天晚上九点时Lucy正在和我一起上网，因此用过去进行时。