Question

【题目】My father was warned ________.
A.not to stay up
B.to stay up
C.stay up
D.not stay up

Answer 1

【答案】A
【解析】句意：我爸爸被警告不要熬夜。warn sb.not to do sth.警告某人不要干某事。此处用到其被动语态的形式。故选A。