题目内容
An expert once said that humans ______ have serious problems in the future if they _______ treat animals well.
A.would, didn’t B.would, wouldn’t C.will, don’t D.will, won’t
练习册系列答案
相关题目
题目内容
An expert once said that humans ______ have serious problems in the future if they _______ treat animals well.
A.would, didn’t B.would, wouldn’t C.will, don’t D.will, won’t