It was a matter of

答案选【A】其实of是介词,后面接一个宾语从句,到底是由【who】还是【whoever】来引导?那就看看它们的意思是什么了?【who】谁【whoever】无论是谁把两个意思代进去,看谁比较通顺点?把【who】意思代进去,【这是一个谁...

扩展阅读：whatsapp messenger ... make allowances for ... if it too much trouble ... days matter ... a matter of debate ... i thought her nice and ... i them that i think ... statue ... legitimate ...