Up to now, our society with limited living space and a shortage of natural resources.
A. has been challenged
B. is being challenged
C. is challenging
D. has challenged
网友回答
(答案→)A. has been challenged
B. is being challenged
C. is challenging
D. has challenged
解析：A 考察动词时态和语态。句义：到目前为止，我们的社会一直面试着生存生成空间有限和自然资源匮乏的挑战。Sb/sth be challenged with sth意为“某人/某物面临着…挑战”，为习惯用法；根据时间状语up to now可知，应用现在完成时。故A正确。