---- Pity you missed the lecture on nuclear pollution.

---- I _________ it, but was busy preparing for a job interview.

A．would have attended

B．had attended

C．would attend

D．attended

以下几种商业模式哪些属于跨境电商？（）

A.消费者通过美国亚马逊网站海淘商品

B.消费者通过洋码头网站购买海外商品

C.消费者通过朋友圈，找人在海外代购，从香港快递至国内

D.消费者通过朋友圈，找人人肉海外商品带回国