9. _____frightened us ____the electricity was suddenly cut off, which threw all of us into the dark.

     A.  It was; that                   B. What was; most was that

     C.  It ; most what                 D.  What;  most was that

________frightened us _________the electricity was suddenly cut off, which threw

all of us into the dark.

　　 A. It was; that　　　　　　　　　 B. What was; most was that

　　 C. It ; most what　　　　　　　　 D. What; most was that