GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - 1NHMBQ96OQ5O29YFX

If a species of parasite is to survive, the host organisms must live long enough for the parasite to (i)____________; if the host species becomes (ii)____________, so do its parasites. A. reproduce B. extinct C. atrophy D. distinguish E. succumb F. infertile