Big or small?
BIG
Open or close?
OPEN
Is it fast or slow?
FAST
Is he going up or down?
UP
Clean or dirty?
DIRTY
Tall or short?
TALL
Strong or weak?
STRONG
Is it small or big?
Small
Wet or dry?
WET
Is it hard or soft?
HARD
Tidy or messy?
TIDY