根据短文内容，完成下列小题。

    During the summer holidays there will be a new schedule(时间表).

    Changes for meal and library service hours and for bus schedules will be shown on the wall outside the dining room. Weekly film and concert schedules, which are being made, will be shown each Wednesday outside the library.

    Buses to the town center will leave the North Beijing every hour on the half during the day. The dining room will serve three meals a day from 7:00 a.m. to 7:00 p.m. during the weekdays and two meals from noon to 7:00 p.m on weekends. The library will continue its usual hours during the weekdays, but have shorter hours on Saturdays and Sundays. The weekend hours are from noon to 5:00 p.m.

    All students who want to use the library borrowing service must have a new summer card. This announcement(通知) will also be shown in the next week's student newspaper.

下列各句中，没有语病的一句是（  ）

材料一：因为雅典宪法完全是寡头政治的，……所以在群众眼中，宪法上最残酷和苛虐的部分就是他们的奴隶地位；当然，他们对于每一件别的事也一样感到不满，因为他们觉得他们自己实际上什么事都没有参与。

——亚里士多德《雅典政制》

材料二：（梭伦）说：“我制定的法律，无贵无贱，一视同仁。”……双方（贵族和平民）都要适可而止，以公正为本。然而，在阶级社会中，根本利益的冲突是无法避免的。……梭伦受到了来自两方的攻击，被迫无奈，最后只身逃出希腊。

——冯俊科《西方幸福论——从梭伦到费尔巴哈》

请回答：

选择划线字的正确读音

①有的玫瑰花开了两三半，有的还是花骨____（gǔ  gū）朵。

②这周丽丽待____（dāi  dài）在家里陪奶奶过周末。

③妈妈从背____（bēi  bèi）后背____（bēi  bèi）的书包里拿出雨衣。

④在动听的音乐____（lè  yuè）声中，我们感受着校园生活的快乐____（lè  yuè）。