Which material can be thrown into the sea on the nature of the material?A. dependedB. dep

问题补充：

Which material can be thrown into the sea on the nature of the material?

A. depended

B. depending

C. to depend

D. depends

答案：

A. depended

(答案→)B. depending

C. to depend

D. depends

解析：考察非谓语动词用法。本句中的depending on the nature of material在句中做状语。句义：根据材料的性质来看，那些材料可以被扔进海里？这里的depending on相当于according to…根据…；故B正确。