GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - 062Q59P5D74H6QN0X

It is a great (i)____________ to be able to transfer useful genes with as little extra gene material as possible, because the donor's genome may contain, in addition to desirable genes, many genes with (ii)____________ effects. A. debacle B. exquisite C. advantage D. sacrilegious E. sabotage F. deleterious