Complete the questions. Add in, on or at.
Do you sometimes watch TV ____ the mornings?
Are you usually at home ____ 7 o'clock ____ the evenings?
Do you sometimes work ___night?
What do you usually do ____ weekends?
Do you usually go shopping ____ Saturdays?
Do you go skiing ____ the winter?
Do you have a holiday ____ December?
Is there a holiday in your country ____ January?

in the morning,at 7 o"clock in the evenings,at night,at weekends,on Saturdays,in winter,in December,in January