GRE Text Completion: Manhatton-GRE填空Manhatton - 8Z5O1X6160WZ6U6V=

Soldier ants are wingless, sterile females that guard the colony and supply it with food, thus acting as both (i)____________ and laborers as the (ii)____________ queen produces enough (iii)____________ to continually populate the colony. A. sentries B. fecund C. forebears D. sages E. efficacious F. progeny G. sycophants H. imperious I. harbingers