Do you think that watching TV is a waste of time?
Do you think that playing sport is a waste of time?
Do you think that shopping is a waste of time?
Do you think that doing housework is a waste of time?
Do you think that playing computer games is a waste of time?
Do you think that cooking is a waste of time?
Do you think that reading newspapers is a waste of time?
Do you think that doing this English course is a waste of time?
Do you think that sleeping is a waste of time?