_____ the front door _____, he had to enter the room through the back door.

A. Seen; painted        　　　　　　 B. Seeing; painted

C. Being seen; being painted　　　　 D. Seeing; being painted

No potatoes for me—I’m _______ a diet.

A. at　　　　　　　　 B. in　　　　　 C. on　　　　　　 D. with

The hurricane damaged many houses and business buildings;　　 ，it caused 20 deaths.?

A.or else　　　　　 B.therefore?　　　 C.after all　　　　　　 D.besides

_____Olympic Marathon is 26 miles and 385 yards,_____distance from Marathon to Athens.