高中英语语法____greatchangeshavetakenplaceinChina.A.Sincethe1900B.Sincethe1900'sC.Since1900D.Since1900'sACD哪错?2.Aftercuttingtheappleinhalfhefound____ofitwasrotten.此处用half,那a

　　高中英语语法

　　____greatchangeshavetakenplaceinChina.

　　A.Sincethe1900 B.Sincethe1900's C.Since1900 D.Since1900's

　　ACD哪错?

　　2.Aftercuttingtheappleinhalfhefound____ofitwasrotten.

　　此处用half,那ahalf为什么就不行?

　　3.Mygrandmother'sbirthdayis___.

　　A.twoweeksaway B.intwo-week'stime

　　选A,B哪错?