The snow is three feet ____.
A.deeply B.deepen C.deep D.deepened
The robber was ___ with a rifle.
A.arm B.arms C.armed D.arming
It is well know that Thomas Edison ____ the electric lamp.
A.discovered B.invented C.found D.developed
The man who does his duty is ___ of praise .
A.worth B.worthless C.worthy D.valuable
We used the back entrance ____ the office building.
A.at B.in C.by D.to