He witnessed Yushu, a county in Qinghai
题型：选择题
问题：
He witnessed Yushu, a county in Qinghai Province hit by _____ unexpected earthquake, but the Yushu people haven’t lost heart, vowing to turn their homeland into _____ more beautiful Yushu.
A．a; a
B．an; the
C．the; a
D．an; a