–This is the first time I _____ pictures with you .

–Now it is time that you ______ a picture for me .

A．took , took

B．have taken , took

C．took , have taken

D．has taken , take

商业银行在销售理财产品时，应先根据投资者的经济状况、风险认知能力和承受能力等，对客户进行必要的分类，明确每类个人理财顾问服务适宜的客户群体，防止由于错误销售损害客户利益。( )