题目内容：
Questionsarebasedonthefollowingpassage Peopleliveingroups,whichwecallsocieties,andsocialrelationsarethesubjects（41）inthesocialsciences.
Mendependonothermenandontheworldaroundthem.Thesunbringsthemwarmthandlight,dayandnight,summerandwinter.Plantsgrow（42）thereisairandsunshine,earthandwater;animalsdependonplants;mendependonwater,air,sunshine,andtheplants,animalsaroundthem.
Whereverpeopleliveand（43）theylooklike,manyoftheirrequirementsarethe（44）.Theyneedfoodandplacestoliveinwarmthandsleep.Theyneedasocialexistence,theyneedfriendshipsandrelationshipswhichwill（45）tomarriageandfamily.Themembersofasocietydependonone（46）
Indifferentsocietywefinddifferentwaysofgettingfoodanddifferentmethodsofpreparingit.
Societieshave（47）habitsandcustoms.Theyteachtheirchildren,careforsickpeople,lookafter（48）peopleinvariousways.Theyhavedifferentbeliefsinlife,death,andtheworld（49）whichtheywereborn.
Mostmenwanttoliveinpeace.Themembersofeverysocialgroupacceptcertainrulesandcustomsandexpectothermemberstoknowthem.Childrenaretaughtto（50）theserules,andwhattheydoinlaterlifedependspartlyonthehabitstheylearnedwhentheywereyoung.
第（41）题选 A．studied
B．searched
C．explained
D．learned
参考答案：
答案解析：