秦朝郡县长官产生的方式是（ ）
A：世代相袭
B：考试选拔
C：地方推荐
D：皇帝任命
The place _____the bridge is supposed to be built should be _____the cross river traffic is
the heaviest.
____，蜡炬成灰泪始干。《无题》李商隐
——________ book is this?——It's Mary's.
