单选题
Animals are one of the most important resources for human beings, however , by 2030 ,many species will have ______ according to recent research .
【正确答案】
B
【答案解析】句意：动物是人类最重要的资源之一，然而，最近的研究显示，到2030年许多物种都会灭绝。use up用尽，耗尽。die out(物种、家族、观念等）绝迹，绝种。go up上涨；晋级。get rid of除去；去掉。B项die out符合题意。