97. Although the rigors of ballet dancing are primarily ______ , this art is also emotionally and spiritually ______ .
A. illusory, taxing
B. exaggerated, balanced
C. physical, demanding
D. appealing, indulgent
E. strenuous, dubious

98. Studies of ______ among turtle are sometimes ______ by the fact that the subjects live so long that researchers retire before the studies can be completed.
A. extinction, enhanced
B. lonevity, hampered
C. behavior, belied
D. mortality, bolstered
E. reproduction, confirmed

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