The number of sharks has fallen greatly in the past three years so measures must be taken

问题补充：

The number of sharks has fallen greatly in the past three years, so measures must be taken to oppose sharks illegally.

A. people to hurt

B. people from hunting

C. people hurt

D. people’s hunting

答案：

A. people to hurt

B. people from hunting

C. people hurt

(答案→)D. people’s hunting

解析：oppose当反对、反抗讲时，后跟动名词或名词，不接不定时，故选D。