It’s difficult for me to decide which one to choose, because ______ of them are good. 

—I don’t like the color of this sweater. Would you please show me __ one?— Here you are.

Some students are playing football. _______are doing their homework.

Sometimes parents find ______ hard to communicate with their children.

---Let’s visit the old people’s house.  ---______ my mother asks me to do homework at home?