单项选择题
Only when all the work was done（）home.
A．the young teacher returned B．did the young teacher return C．returned the young teacher D．the young teacher did return
单项选择题 We are going to have the service man （）the light in the classroom tomorrow.
单项选择题 Only three of the people we invited to the party didn't show（）
单项选择题 Among all the workers in the company, Tom works（）
