Who travelled in summer? Three pupils travelled in summer, didn't they? Did three pupils travel in summer? Did three pupils travel in summer or in winter? When did three pupils travel?
One pupil didn't travel in summer, did he? Did one pupil travel in summer? Did one pupil travel in summer or in autumn? Who didn't travel in summer? When didn't one pupil travel?
Three pupils travelled in summer, didn't they?
Did three pupils travel in summer?
Did three pupils travel in summer or in winter?
When did three pupils travel?
One pupil didn't travel in summer, did he?
Did one pupil travel in summer?
Did one pupil travel in summer or in autumn?
Who didn't travel in summer?
When didn't one pupil travel?