_______ the programme, they have to stay there for another two weeks.

A．Not completing

B．Not completed

C．Not having completed 

D．Having not completed

—______ my teacher, Miss Li. Miss Li, ______ my brother, Jack.

—Nice to meet you, Miss Li.

—Nice to meet you, Jack. [ ]

A. This's; He's

B. She's; He's

C. This is; this is

D. This's; this's