发育期的上颌正中间隙，在哪个牙萌出后间隙关闭（）。

A.上颌中切牙

B.下颌尖牙

C.上颌第一双尖牙

D.上颌尖牙

E.上颌第二双尖牙

Having the highest marks in her class, a scholarship was offered her by the Department.

A．she was offered a scholarship by the Department

B．a scholarship was offered to her by the Department

C．the Department has a scholarship to offer her

D．the Department offered her a scholarship