to light for a long time the potatoes turned green.A. Introduced toB. Exposed toC. Linke

问题补充：

to light for a long time, the potatoes turned green.

A. Introduced to

B. Exposed to

C. Linked to

D. Connected to

答案：

A. Introduced to

(答案→)B. Exposed to

C. Linked to

D. Connected to

解析：考查短语辨析。Introduced to介绍给，Exposed to暴露于，Linked to 联系，. Connected to与什么联系。句意：长时间暴露于光下，土豆会变绿。所以选B。