问题补充：
.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
答案：
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：考查倒装句：句意：只有当你的身份被核实，你才能被允许进入。Only+状语从句的时候，主句用部分倒装，will提到主语前面，而且you和allow是被动关系，选D。
