When you into the gallery you feel as if you inside a fragile white seashell.A. walking

问题补充：

When you into the gallery, you feel as if you inside a fragile, white seashell.

A. walking, are

B. walked, were

C. walks, are

D. walk, were

答案：

A. walking, are

B. walked, were

C. walks, are

(答案→)D. walk, were

解析：考查时间状语从句和as if的虚拟语气：句意：当你走进画廊，就好像你走进了芳香的白色的贝壳。When引导的时间状语从句用一般现在时，表示一般情况，as if引导的从句用过去时表示和现在情况相反。选D。