A-A+
We do not have adequate ______for the use of a
问题详情
We do not have adequate ______for the use of animals.
A. subsequents
B. substitutes
C. substances
D. substitutions
参考答案
正确答案:B
[解析] subsequents:后来的;substitutes:替补,代替;substance:本质;substitution:替换,代用。