题目内容:
During1930s,whydidthepercentageof17-year-oldswhograduatedfromhighschooljumpedgreatly?
A.Becausetheybelievedhighschooleducationisnecessary. B.Becausetheycouldn'tfindjobsandtheyhadnobetterchoices.
C.Becausethecostofgoingtoschoolwasreduced.
D.Becausetheybelievedhighschooleducationcouldhelpthemmakemoremoneyinthefuture.
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答案解析: