For quite a few students, their teacher’s advice is more important than _______ of their parents’.

 We must find a dictionary. ____ will do.

At the beginning of the party,______ of the guests was given a piece of paper.

The two girls are so alike that strangers find________difficult to tell one from the other.

--- Why is the cake so expensive?---- Maybe you don’t know a cake made of wheat costs less than _____ made of rice.