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
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
A
【解析】句意：一位专家曾说，如果人类不善待动物，将来会有严重的问题。考查宾语从句和if引导的条件状语从句。第一个空所在句子为that引导的宾语从句，主句谓语动词said为过去式，从句的谓语动词应用过去时态范畴之内的任一时态，故C、D选项可排除。第二个空所在句子为if引导的条件状语从句，其主句humans would have serious problems in the future用的时态为过去将来时，根据“主将从现”原则，if从句应用一般过去时，B选项wouldn’t为won’t的过去式，不符合句意可排除，故选A。