中国农业银行
单选题in the company for three years, Mark has become experienced in business negotiations. ______
A． Having worked
B． Have been worked
C． Have worked
D． Worked
参考答案：A进入在线模考
【答案】A。解析：根据“for three years”和主句中的现在完成时态可以推知，此处应该用现在完成时的主动形式。故排除B和D。根据句意可知，空格处所在分句在句中作原因状语，故排除C。因此答案为A。
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