hisfather,Alec,oneofScottishdescent.()hismother,Siobhan,comefromalargeIrishfamily.A.whenB.whileC.whatD.who

Question

his father,Alec,one of Scottish descent .( )his mother,Siobhan ,come from a large Irish family.
A.when B.while C.what D.who

Answer 1

从给出的选项里,只有while合适.大意是他爸爸祖上是苏格兰人,妈妈是爱尔兰人.
但是你给的原文不完整,标点符号也是不对的.通常来讲,while作为连词,用来连接两个意思并列（跟and接近）,或者相对（但又比however的语气稍弱）的句子.
建议参考下文：
His father,Alec,is of Scottish descent,while his mother Siobhan comes from a large Irish family.