根据中文提示完成句子。
1. 体育课我们必须穿运动鞋。
We have to wear _____ ______ for P.E class.
2. 在图书馆内不要大声说话。
Don't _____ _____ in the library.
3. 晚上十点前我必须睡觉。
I have to _____ _____ bed by ten o'clock at night.
4. 亚历克斯每周到少年宫学钢琴。
Alex goes to the Children's Palace _____ _____ the piano every week.
5. 你不能和你妈妈争吵。
You can't _____ _____ your mother.
