—Good news! Bill won _____ medal in the long jump just now.

—Really? That's his _____ one at our sports meeting. [ ]

A. a; four

B. an; fourth

C. a; fourth

D. fourth; a

法律另有规定除外，劳动者解除劳动合同，应当()通知用人单位。

A.提前10日

B.提前30日以书面形式

C.口头

D.事先书面