【C】
        Everyone has good and bad moods, but for some, feeling happy or sad seems to be linked to theweather. According to one common theory, the more sunlight people get, the better they feel. Are thetheories, such as this one, ___31___ by science, though?
       One way in which weather seems to affect mood is seen in those who suffer from SeasonalAffective Disorder (SAD). People with SAD feel bad during the same season each year—usually inthe winter. Psychologists are not sure what causes SAD, but they think that it could be brought on bya lack of sunlight. Not getting enough sun interferes with one’s pattern of sleep and affects the brainchemical that controls one’s mood.
       To better understand the relationship between weather and mood, scientists from various partsof the world have studied the effects of a variety of weather types. A 1980 study conducted in theU.K. found that of all the weather factors measured, humidity affected mood the most by makingpeople feel sleepier and less able to concentrate. Since then, however, other studies have drawndifferent conclusions.
        In 2008, a detailed study on weather and mood was done by researchers from a Germanuniversity. Participants were first given a personality test, and then a diary for ___32___ their dailymood. The researchers used ZIP codes to track the weather in each person’s area. In the end, thestudy found that darker days, cooler temperatures, and winds often had negative effects on mood.However, ___33___ most of us think of as good weather—clear skies and sunshine—was found tohave minimal positive effects.
         Mixed results were again found in a 2011 survey of people in the Netherlands. In this study,researchers identified four distinct categories that described ways in which people react to theweather. Among these groups, the “summer haters” reported being in a worse mood when theweather was sunny and warm, which goes 34 the general idea of SAD.
        Findings from these studies are so varied that researchers could come to only one conclusion:there might be a link between mood and weather, but no universal rule seems to govern it. Therefore, ___35___ waiting for the right weather to lift us up, take control by doing things that bring you joy.
【題組】31.
(A) backed up
(B) taken up
(C) broken up
(D) added up