补全短文

Is all this concern a waste of human effort? ________. Are we losing our sense of what is reasonable and what is unreasonable?

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6-12岁英语高频重点词汇，搞定小学英语全段考试

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A、Life seems to have grown too tough for black robins.

B、Is it any business of ours whether the black robin survives or dies out?

C、The organizers say that Little Mangere should then be restocked (重新准备) with the robin's food.

D、Energetic steps are being taken to preserve the black robin.

【正确答案】 B

【答案解析】 前后句分别为问句，选项B与其共同构成了三个排比的问句结构。所以，选项B是合适的选项。

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