Combine the sentences with ''because''
1.She stayed at home.She was sick
........................................................................................................................................................................................
2.Sonia was tired.She worked very hard
........................................................................................................................................................................................
3.We provide evening classes for street children.They don't have opportunity to go to scholl
.......................................................................................................................................................................................
4.You should recycle rubbish.It helps protect the environment
.........................................................................................................................................................................................
5.We talk and sing for the elderly people.It makes them happy
.........................................................................................................................................................................................