( )This sign tells us the exit is___the gate of the cinema A of B for C at D in

( )This sign tells us the exit is___the gate of the cinema A of B for C at D in

D
at the gate 在大门那里追问没有is，我看答案是B,不知道是为什么，是不是答案错了追答答案是C at
b 是错误答案。

C at
.追问没有is，我看答案是B,不知道是为什么，是不是答案错了

This sign tells us the exit ___the gate of the cinema
This sign tells us the exit 【for 】the gate of the cinema.
若exit改成entrance,for介词变成to，如果是宾语从句是at；
This sign tells us the exit is 【at】 the gate of the cinema