根据汉语意思完成句子
1 这本书对年轻人有良好的影响
This book has ____ ____ ____ ___ young people（a good influence on）
2上个学期我数学学得很吃力
i ____ ___ _____ ______ with my math last semester(had a hard time)
3你应该养成早起的好习惯
you should ____ _____ _____ _____ of getting up early(start a good habit)
4 去爬山对我们来讲是个好主意
It is _____ ____ _____ for us ____ _____ the mountain(a good idea to climb)