As a student, we should keep our classroom ________.

It was on a cold winter evening _____ his father left home and was never back.

You cannot accept an opinion ________ to you unless it is based on facts.

Oh, it’s you, Mrs Johnson! I ________ you.—I’ve just changed my hair style and I am wearing a new dress.[ ]

Hi, Susan, I didn’t see you at the party.— Oh, I ____ for an English test.