Tobacco is one of the most __________ source of tax.
A. profitable
B. obvious
C. prominent
D. promising
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Today's __________ 60-year-old has the health of a 50-year-old two decades ago
A. average
B. daily
C. often
D. frequent
Universities show great enthusiasm for the program for the purpose of cutting down on their __________.
A. prices
B. expenses
C. losing
D. consumption
Water had __________ out of the bucket onto the floor.
A. spilled
B. tortured
C. swallowed
D. distained
We cannot __________ that our flights will never be delayed.
A. stimulate
B. resume
C. prevail
D. guarantee