医学全在线每日一练免费为所有职称英语考生免费提供练习题，祝广大考生顺利通过2016年职称英语考试。
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?
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。
点击进入：职称英语考试每日一练汇总
