一个数由3个千万，4个十万，5个千，6个百和7个十组成，这个数写作______，改成用“万”作单位的数是______万，四舍五入到万位约为______万．

--- Do you know ________ girl in pink on the playground?

--- Oh, yes, she is ________ honest student. She is my best friend.

A．the; an

B．the; a

C．a; an

D．the; the