Who is , Mr Green or Mr Smith?
A. very rich
B. much richer
C. the richest
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Do you think which classroom is in our school?
A. clean
B. the cleaner
C. the cleanest
Mr Zhang is one of in No. 1 Middle School.
A. the busiest teacher
B. the busiest teachers
C. the busy teachers
Of all the boxes, the red one is .
A. heavy
B. heavier
C. the heaviest
Our school is not so as theirs.
A. small
B. smaller
C. the smallest