问题
选择题
---Why do you look so worried?
---I’m expecting a call from my son. He London for three days.
A．has been to
B．has been in
C．has gone to
D．has come in
答案
答案：B
题目分析：句意：你为什么看起来这么焦虑？我在期盼着儿子打来的电话。他去伦敦三天了。句中有表示一段时间的短语for three days，所以谓语动词必须是延续性动词，故选B。