—It is the first time that I ________ here in Hong Kong.

—What great changes！It’s ten years since I ________here last time.

A．have been；came

B．have been；have come

C．am；came

D．was；have been

为第三人利益订立的合同，第三人拒绝接受权利时，合同所设定的权利归属于( )

A．债权人
B．债务人
C．债权人和债务人
D．国家