Visitors are ____not to touch anything in the museum.A asked B invited C let D allowed为什么不是D

问题描述:

Visitors are ____not to touch anything in the museum.
A asked B invited C let D allowed
为什么不是D

如果是D的话用not allowed to A才用 asked not

如用D,要用成Visitors are not allowed to touch anything in the museum