What a beautiful city our hometown is! There are many trees ___________ of the road! — Yes, and ____________ of the trees is growing larger and larger.

This machine was used ——-years ago.

Miss Li, where did you visit last week?— I visited a big company __________ ships are made.

There are three ________ students in their school.

Leonardo da Vinci ________ birds kept in cages in order to have the pleasure of setting them free.