B. Cloze 
      People have been social distancing, wearing masks and skipping gatherings with friends
and family in order to slow the spread of the coronavirus, but nearly a year of ever-changing
public safety guidelines with long days cooped up at home    16   .wearing on many people.
      Pandemic fatigue happens when people are asked to make behavior changes over a long
period of time, which is much harder than short-term changes, said Dr. Itai Danovitch. It's    17   . to other lifestyle changes people try to make, like eating healthier and working out to lose weight, Danovitch said. Most people can follow the new rules for a short period of time, but   18   . the new behaviors can be tough. "We get tired and we resort to our usual behaviors, and when the requirements are coming from sources outside themselves, it adds a whole other layer of    19   . ," Danovitch said.
      Young adults are especially susceptible to pandemic fatigue,   20   a news release published by Cedars-Sinai Medical Center. The fatigue could be explained by taking a peek a news release inside their brains. The frontal lobe, which is    21   . decision-making, Danovitch said, is not fully developed until age 25. He attributes it as one of the main reasons    22   . young adults make impulsive decisions and are "less inclined to weigh the risks and consequences over the long term of a given behavior."
      Research psychologist Jeffrey Arnett of Clark University in Worcester, Massachusetts,    23   . of that theory, mainly because young adults throughout history have had to make important decisions at young ages. Instead, Arnett describes the brain as being shaped by a person's circumstances. In the United States, many young adults are not required to exercise much mature thinking   24  . they are responsible for others, he said. Because these young adults are   25  . likely to have people to answer to or take care of, their independent thinking doesn't always look at how their actions affect others. In the case of the virus, Arnett said, young people might not be thinking how their actions could make others ill.
(Adapted from an article by Megan Marples, CNN, Jan. 13, 2021)
【題組】16.
(A) are
(B) are not
(C) is
(D) is not