多选题 Since codfish are ______ part of the marine ecosystem, their ______ would adversely affect the animals who depend on them as a source of food.

A、 a negligible
B、 an integral
C、 an inexplicable
D、 existence
E、 proximity
F、 extinction

【正确答案】 B、F

【答案解析】[解析] ● Since说明前后同义重复。
● 第二空与adversely affect(负面影响)对应；第一空充当逻辑关联。
● 两空联动，若第一空填入逻辑正向的词，则第二空与adversely affect同义重复；反之，则第二空与adversely affect反义重复。
● negligible可以忽略的，integral不可缺少的，inexplicable难以解释的；existence存在，proximity接近，extinction灭绝。答案选BF。