.I didn’t know if _____ was around and I felt ______.

问题描述:

.I didn’t know if _____ was around and I felt ______.
A.someone,frighten B.someone,frightened
C.anyone,frighten D.anyone,frightened
我选的是B,可是错了,应该选D,可是为什么要用anyone呢?

表示不确定有没有人用anyone