Only when your identity has been checked, .
A. you are allowed in
B. you will be allowed in
C. will you allow in
D. will you be allowed in
网友回答
A. you are allowed in
B. you will be allowed in
C. will you allow in
(答案→)D. will you be allowed in
解析：句意：只有在身份被严明后，你才能被允许进入。这里only+when引导的状语从句放在句首时，主句的谓语动词要用部分倒装，故排除正常语序的选项AB；又因为you与allow之间应是被动关系，故排除C；故选D。