Take a took outside the windows.you( ) TV for three hours.A.have watched B.have been watching
问题描述：
Take a took outside the windows.you( ) TV for three hours.A.have watched B.have been watching
答
选B ，由第一个句子可以知道后面的这个动作正在进行，所以用现在完成进行时
答
B
表示这三个小时一直持续未间断的状态
答
这里应当选B.having been watching.
意思是：去外面走一走吧,你已经连续看3个小时的电视了!