The environment is becoming worse and worse. I think we should do something to ____ people ____ cutting the trees in order to protect the earth.

I think it’s_______ useful advice, so I will always remember it.

We usually go to work _____ subway. [ ]

Whose book is this?—-It _______ our geography teacher’s. You see, his name is on it.

This hat is too ________ / bIg/. Do you have a small one?