--- Why are the four students so happy?
---______ in the science competition, they are awarded prize money totaling $ 20,000．

1. A.
   Judged the best
2. B.
   Judging the best
3. C.
   To be judged the best
4. D.
   Having judged the best

— Why are the four students so happy?

       —______ in the science competition, they are awarded prize money totaling $ 20,000．

       A．Judged the best                   B．Judging the best

       C．To be judged the best          D．Having judged the best

— Why are the four students so happy?

—______ in the science competition, they are awarded prize money totaling $ 20,000．

A．Judged the best                                 B．Judging the best

C．To be judged the best                              D．Having judged the best

— Why are the four students so happy?

　 —______ in the science competition, they are awarded prize money totaling $ 20,000．

A．Judged the best　　　　　 B．Judging the best

　 C．To be judged the best　　　 D．Having judged the best

---Why are the four students so happy?　

---_______ in the science competition, they are awarded prize money totaling $20,000.

A．Judged the best　　　　　　　     B．Judging the best　　

C．To be judged the best 　　　　      D．Having judged the best

---Why are the four students so happy?　

---_______ in the science competition, they are awarded prize money totaling $20,000.

A．Judged the best　　　　　　　             B．Judging the best

C．To be judged the best 　　　　         D．Having judged the best