单项选择题
He tried to show me how it （）but he couldn ’t make it roll back up the string.
A.workedB.functionedC.rolledD.did
单项选择题 They all did wrong，why （）him out for punishment？
单项选择题 The young peasant went out west to try his （）.
单项选择题 After two months ’training，the worker now （）the machine with ease.
