问题
选择题
---He ought to have been warned of the danger.
---_______, but he wouldn’t listen to me.
A．He did
B．He should
C．He ought to
D．He was
答案
答案：D
考查特殊句式。So + 主语+ 助动词/系动词/情态动词，表示“的确如此”。根据答语后半句可知空处表示他的确被警告了，因此选D。