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带many的单复数问题Sinceanewteachingmethodwasused,manyaboyandgirlinhisclassgreatprogressinEnglish.A.havemadeB.hasmadeC.weremakingD.wasmaking请简要分析谢谢~

题目详情
带many的单复数问题
Since a new teaching method was used, many a boy and girl in his class _______ great progress in English.
A.have made
B.has made
C.were making
D.was making
请简要分析 谢谢~
▼优质解答
答案和解析
选B
many a 是个固定搭配,虽然表示很多的意思但后面都要跟单数的动词
有Since 要用完成时态