交通银行

单选题 __________ announcing his retirement, Mr. Kinsley has been busy trying to train his replacement.

A.Because
B.Once
C.Since
D.While

参考答案:C进入在线模考
备选答案均为连词,可一一带入后,选择最符合句意的。根据前一个分句内容(宣布退休)和后一分句内容(忙于培训他的接班人),since(自……以来)最恰当。since announcing his retirement在意思上相当于since he announced his retirement,前者使用现在分词来表达,后者使用从句来表达。