The oceans and seas the islands are more or less polluted.A. surroundingB. surroundedC. a

问题补充：

The oceans and seas the islands are more or less polluted.

A. surrounding

B. surrounded

C. are surrounded by

D. are surrounding

答案：

(答案→)A. surrounding

B. surrounded

C. are surrounded by

D. are surrounding

解析：考查分词做定语。不同中的动词surround与前面的名词The oceans and seas构成逻辑上的主动关系，故使用现在分词短文在句中做定语，修饰前面的名词。句意：包围岛屿的海洋或多或少地都受到了污染。故A正确。