With so many _____ , the exact cost of this experiment is difficult to estimate.
A. vary
B. various
C. variables
D. varieties
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It is a _____ to say you support him but would not vote for him in the election.
A. contradict
B. contradictory
C. contrary
D. contradiction
Her own experiences had made her _____ to other people's troubles.
A. sense
B. sensitive
C. sensory
D. sensational
Obviously, it was more of a _____ crime than an accident.
A. magnetic
B. deliberate
C. spontaneous
D. transparent
Women suffering from iron _____ can take supplements in the form of tablets.
A. sufficiency
B. efficiency
C. deficiency
D. proficiency