Solve these analogy problems
Ground : sky :: floor : ____
A.Doorway
B. Wall
C. Roof
D. Ceiling

Banister : staircase :: shelf : ____
A. Bookcase
B. Lamp
C. Room
D. Photographs

Heat : perspire :: cold : ___
A. Sleep
B. Swear
C. Shiver
D. Sweat

Saw : cut :: needle : ___
A. Force
B. Rip
C. Mend
D. Grow