根据《招标代理服务收费管理暂行办法》的规定，招标代理服务收费实行政府指导价的，其E下浮动幅度不超过（）。

A．150%

B．20%

C．25%

D．30%

—Robert is indeed a wise man.

—Oh，yes.How often I have regretted ______ his advice!

A．to take

B．taking

C．not to take

D．not taking