精选优质文档-倾情为你奉上新概念习题Lesson 143144一、 选择填空1.What language _ in America?A.speakB.spokeC.spokenD.is spoken2.The windows _ yet.A.havent openedB.havent been openedC.didnt openD.didnt opened3.This kind of flower must _ every day.A.waterB.be wateredC.wateredD.watering4.This kind of bike _ in Tianjin.A.is madeB.makesC.is makingD.made5.They _ to clean the classroom yesterday