选哪个?为什麽,解析语法点,It’s said that conference to be held in Room 223 ________till next FridayA will put off B.was put off C.has been put off D.is putting off
问题描述：
选哪个?为什麽,解析语法点,
It’s said that conference to be held in Room 223 ________till next Friday
A will put off B.was put off
C.has been put off D.is putting off
答
B 过去时被动语态
答
B,
答
C
答
C
被延期了，延期过程已完成，所以是完成时
答
C.因为延期这件事仍然有影响,所以用现在完成时的被动语态.
答
D