This movie is referred to ______ amasterpiece of the famous director.

It was not until Tom took off his dark glasses that I _____ him.

What I want to say is that our class won’t be able to finish the work unless we________each other.[ ]

Studying alone, you are free to choose what to learn and when, ________ you don’t need others’ agreement

The policeman asked us _____him send the old man to the hospital.