do you go to school, on foot or by bus?

---___________ do you watch TV every day?---For about half an hour.

It was not until the 18th century that man realized that the whole of the brain was involved in the working of the mind，　　　　？

-- _____________did your uncle leave his hometown ?--He ____________ for nearly twenty years.

—She has gone abroad, ______?—No. She is still teaching us English at our school now.