Locating the (i) ________ organisms of the ocean has proven a daunting task The ocean has more than 250 times the habitable volume as the land, leaving (ii) _________ amounts of space to cover. Even being able to locate viruses and phytoplankton, let alone being able to study their relationship to the environment, is a tremendous undertaking. But (iii) _________ understanding of marine life cannot be attained without knowing the role that microscopic organisms play in it.

Blank (i)	Blank (ii)	Blank (iii)
A. haughty	D. exorbitant	G. exhaustive
B. vituperative	E. coquettish	H. diminutive
C. enigmatic	F. ardent	I. reticent