如图，已知直角梯形OABC的边OA在y轴的正半轴上，OC在x轴的正半轴上，OA=AB=2，OC=3，过点B作BD⊥BC，交OA于点D．将∠DBC绕点B按顺时针方向旋转，角的两边分别交y轴的正半轴、x轴的正半轴于E和F．
A：____
B：Winter.
A：Why?
B：____ And Christmas is in winter, too.
A：What do you often do in winter vacation?
B：____
A：When do you get up in winter vacation?
A：When do you go to bed?
A．Because I like winter vacation.
B．Which season do you like best?
C．At 7：00 a．m.
D．At 9：00 p．m.
E．I often play basketball with my brother.
