We have strong for believing that the newly-invented material is not only popular but also a monument to the eco-friendly lifestyle.
A. grounds
B. reasons
C. causes
D. purposes
网友回答
(答案→)A. grounds
B. reasons
C. causes
D. purposes
解析：词义辨析grounds用于复数时是指一种说法、一种信仰、或一个动作的事实或逻辑根据。reason是一个动作、决定、或信仰的依据或动机。cause着重指产生或造成某事发生的原因,往往指造成不好的影响。Purpose意思是目的；意志。根据题意，我们有足够的理由相信……，这个理由来自某种事实依据，故选A。