Our headmaster isn’t in his office. I can’t find him anywhere. Did you notice him ______ the office?

A. to enter                 B. enter                    C. to leave                  D. leave

 ---Excuse me, I want to buy some books, but I can’t find a book shop.

         --- I know _______ nearby. Come on. I’ll show you.

A. it            B. some           C. one                D. that

---Mary, it’s going to rain. Better take ________ raincoat with you.
---Well, but I can’t find ________ raincoat I put here yesterday.

I like your pet dog very much. But I can’t find _______ in the pet shop. Where did you buy _______?