GRE Logical Reading: ETS-GRE逻辑单题ETS - T6V1I54N9D7WIX0KK$

Drug manufacturer: Although our company requires that patients who use our new drug also purchase from us non-reusable kits for weekly blood testing, the expense of those kits is an entirely necessary one: weekly blood testing must be done to monitor the drug's potential side effects, which can be very dangerous.