Question

（ ）he works hard,I don't mind when he finishes the experient.

A.So far as B So long as 两个都有只要的意思 为什么选b选A？

Answer 1

So far as是“就..而论”，“远至...，到..程度”等意思。而So long as是“只要""长达...（多用于时间）”等意思

Answer 2

so long as
1.only if只要
2.since;to the wxtent that既然；由于；就……来说

so far as
就……而言

显然，B，取第一个意思