GRE Text Completion Question 3304
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Source: NO3
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 misfortune.. unpredictable
- B disappointment .. superfluous
- C convenience.. exquisite
- D accomplishment.. profound
- E advantage.. deleterious