5: IN:the morning, July, autumn, the afternoon, the evening, the weekend.
ON:Thursday, Monday, Christmas, Christmas day.
AT:three o'clock
6: a)I usually have lunch with my sister at noon.
b)My birthday is in October.
c)I go to school every day at half past seven.
d)I do my homework in the afternoon.
e)We sometimes see them in the weekend.
7: 1)When is your birthday?
2)When do you usually visit your grandparents?
3)When do you start classes every day?
4)When do you have lunch?
5)When do you do your homework?
