一、 綜合測驗：下面三篇短文共有 15 題，每篇各有 5 題，為第 1 – 15 題，請依短文文意，選出一個最適合該空格的答案。
▲ 閱讀下文，回答第 1−5 題
      Research has established that transportation workers have the highest COVID-19 risk
score, 75.7 out of an average 30.2, of 966 non-health jobs assessed. Requirements to provide a
negative COVID-19 test before boarding don’t eliminate the danger of    1    . Although the air
on planes is cleaner than that of almost all other indoor spaces due to the sophisticated air
circulation system, planes are still not completely safe. Flight attendants are more    2    from
COVID-19 than anyone else on a plane, just by the nature of their work. Close quarters mean
they come within six feet of every passenger and each other multiple times during a flight. Flight
attendants are   3    to contracting the virus when passengers remove their masks to eat or
drink and when trying to convince an anti-masker to comply    4    rules. Federal protections
for crew members are limited, and each airline has its own set of policies. In the meantime,
cabin crew members are still left with open-to-interpretation guidelines that vary from airline to
airline – and few consequences for passengers who defy them. Besides that, other COVID-19
related workplace concerns remain, such as    5    policies on contact tracing, testing, and
quarantine, plus potential consequences for crew members who miss shifts to isolate after
exposure to the virus.
【題組】1.
(A) infect
(B) infected
(C) infecting
(D) being infected