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20. Answer: pathogens
Explain
He calculated that … in the air coming from patients suffering from … would not have harmed other patients.
· Key words: calculated, air, patients, suffering, harmed, other patients
· In the last sentence of paragraph D, Short explained his findings: “We put pathogens in the airstreams, modeled for someone with tuberculosis … the ventilation systems in the room would have kept other patients safe from harm”. So, patients with tuberculosis (TB) would release pathogens in the air when they coughed – these minute organisms would harm other patients unless there was good ventilation. Short modeled this in his experiment. The answer for 20 is “pathogens”.
· The purpose of this experiment was to test whether the system could prevent TB pathogens from spreading. Therefore, it is clear that answer for question 21 would be “tuberculosis”.
21. Answer: tuberculosis
Explain
He calculated that … in the air coming from patients suffering from … would not have harmed other patients.
· Key words: calculated, air, patients, suffering, harmed, other patients
· In the last sentence of paragraph D, Short explained his findings: “We put pathogens in the airstreams, modeled for someone with tuberculosis … the ventilation systems in the room would have kept other patients safe from harm”. So, patients with tuberculosis (TB) would release pathogens in the air when they coughed – these minute organisms would harm other patients unless there was good ventilation. Short modeled this in his experiment. The answer for 20 is “pathogens”.
· The purpose of this experiment was to test whether the system could prevent TB pathogens from spreading. Therefore, it is clear that answer for question 21 would be “tuberculosis”.
22. Answer: wards
Explain
He also found that the air in … in hospitals could change as often as in a modern operating theatre.
· Key words: air, hospitals, change, often modern operating theatre
· The first sentence of paragraph E states that “19th-century hospital wards could generate up to 24 air changes an hour – that‟s similar to the performance of a modern-day, computer-controlled operating theatre”. This
means that the air in hospitals wards could change as often as in a modern operating theatre. Thus, the word in the blank is “wards”.
· Answer: wards