We should tell hunters _______tigers.

We will have finished ________ Unit 15 by April. We can review all the lessons.

Do you know the boy ________ is sitting next to Jim? Yes. He is Jim’s friend. They are celebrating his ________ birthday.

What are you doing, Jack?—I’m looking for some information about the event ________ attracts all the people’s attention.

Why are you so _______,Amy?—I thought I lost my purse, but I didn’t. I found it in my study!