( )的导游人员才有资格从事导游工作。

A．取得全国导游人员资格证书

B．与旅行社签订劳动合同或在导游服务公司登记

C．向当地旅游行政部门申领导游证

D．定期参加培训

E．获得导游人员等级证书

As for the influence of Internet，nowhere（）the results more clearly than in the US.

A.we have seen

B.we had seen

C.seen we have

D.have we seen