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?
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