Guangzhou’s high school students have beento a lot of foreign cultures .but they never for

问题补充：

Guangzhou’s high school students have beento a lot of foreign cultures,.but they never forget their own.

A. contributed

B. limited

C. devoted

D. exposed

答案：

A. contributed

B. limited

C. devoted

(答案→)D. exposed

解析：D expose的意思为 “使暴露于;使接触到；受……的影响”, 符合句意。“广州的高中生受许多外国文化的影响，但是他们从来不忘记他们自己的”。其他选项与句意不符。