登斯楼也，则有_______，_______，_______，其喜洋洋者矣。

——Do you like math?

——Yes, it's difficult _________ interesting.

根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    On Sundays, Li Lei gets up at six thirty. He has 1 at eight. Then he helps his mother 2 the housework（家务劳动）. At ten o'clock he leaves 3 and goes shopping 4 bike. At about eleven o'clock he comes 5 home.

    He likes 6 very much. He helps his mother with the cooking. They 7 lunch at twelve.

    In the afternoon he often 8 games with his friends. They have 9 at six thirty. In the evening he does his homework. Sometimes, he 10 TV. He goes to bed at nine.