选择一个答案并解释说明what he thought and did at home(has have) nothing to do with his problem

选择一个答案并解释说明what he thought and did at home(has have) nothing to do with his problem
选择一个答案并解释说明what he thought and did at home(has have) nothing to do with his problem

选择一个答案并解释说明what he thought and did at home(has have) nothing to do with his problem
主语是一个整体的,谓语用单数.
what he thought and did;
the writer and poet;
the fish and chips;
etc.
关键看冠词的数量,再联系上下文校对一下

HAS,整体作为一个主语,故用单数