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.