单选题When he was a little

问题补充：

单选题Whenhewasalittleboy，he______onthefarm.A.used to workingB.used to workC.got used to workD.was used to work

答案：

B解析used to do sth.意为"过去经常做某事"。be used to do sth.意为"被用来做某事"。be/get used to doing sth."习惯于做某事"。