—— Have you seen___pen? I left it here this morning.—— Is it___black one? I think I saw it somewhere.
The students are ______ to hand in the exercises before class.
All the students went to see ______ with her.
_____ by what everyone says about him, I’d say he has a good chance of winning.
Anne looks______in red while green clothes are nice ______Helen.
He was so angry at all _____ I was doing _______ he walked out.