GRE Text Completion: ETS Official Practice 150-GRE OP150:填空 - SG4UJFT3ORMEN7I5O

A particular bacterium that has never encountered a particular virus will usually succumb to it, a ____________ that may, surprisingly, be beneficial to the colony in which the bacterium lives. A. susceptibility B. theory C. characteristic D. juxtaposition E. collision F. hypothesis