根据汉语意思完成下列句子。
1.你怎么不加入一个英语俱乐部来练习讲英语呢?
Why ____ ___ an English club ___ practice ___ English?
2.生活中每个人都会犯错误.
Everyone will ____ ___ in life.
3.我爷爷习惯星期天去钓鱼.
My grandfather is ____to____ ____ on Sundays.
4.在那个年纪他们还不够严肃.
They are not ____ ____ at that age.
5.作为学生,我们应该遵守校规.
As students, we should ____ ___ ____ in our school.