问题
选择题
---- If he_____ , he ______ that food.
---- Luckily he was sent to the hospital immediately.
A．was warned; would not take
B．had been warned; would not have taken
C．would be warned; had not taken
D．would have been warned; had not taken
答案
答案：B
考查与过去事实相反的虚拟语气，其构成为if +主语+had done ,主句为would/could/might+ have done,根据句意如果他被警告的话，他就会不吃那种食物了。表示的是过去，所以选B。