[ Adjectives and Adverbs ]
Of all the sports, swimming is the one that uses oxygen (rapidly)
A. most rapidly
B. more rapidly
C. rapidest
D. rapider

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Grammar › ViewAdjective Comparative Superlative
hot, hotter, ________________
A. hottest
B. hotter
C. hotteesst
D. hot
Tenses › View
Fill in the blank
The flight (start)………. at 6 a.m every Thursday.
A. start
B. starts
C. is starting
D. started