完形填空：There are many diffierences(不同）__41__ boy's and girl's

完形填空：There are many diffierences(不同）__41__ boy's and girl's favorite subjects__42__ school
There are many diffierences(不同）__41__ boy's and girl's favorite subjects__42__ school.Mary young __43__like math and languages(语言）.Most__44__boys like P.E.__45__many sixteen-years-old boys like science 46__math.Mary sixteen-years-old girls__47__foreign(外国的)languages,but science and math __48__their favorite subjects.__49__ don't girls and boys have __50__ favrite subjects?We don't know.
41.A.both B.between C.from D.about
42.A.in B.on C.beside D.to
43.A.boy's B.girl's C.boys D.girls
44.A.old B.tall C.young D.big
45.A.So B.And C.For D.Because
46.A.For B.to C.and D.of
47.A.like B.speak C.know D.want
48.A.are B.is C.are't D.isn't
49.A.Why B.What C.When D.Where
50.A.same B.the same C.difference D.different