________they decide which college to go to，students should research the admission procedures.

Is this _______ iPhone 6s—No, it isn’t. Ask Tom. He’s just lost______________.

We’d better set off，or it will be dark we know it

The little girl ______ the tail of his brother’s coat the moment she saw he would hurry away without her.

He is a friend ______ can help you in timeof need.