已知点O为△ABC的外心，若∠A=80°，则∠BOC的度数为（　　）

用所给词的适当形式填空

（1）—When does Mary usually go to bed？

         —She ____ (go) to bed at nine thirty.

（2）Tony's sister always ____ (do) her homework first when she gets home．

（3）Ice-cream usually ____ (taste)good.

（4）My father often ____ (take) a walk in the evening.

（5）Tony usually gets up late. He doesn’t have time ____ (eat) breakfast.

This photo reminds me           the days when I worked           the farm with my classmates.

太平天国运动的领导者是（    ）