Choose the correct preposition to complete each sentence

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V. Choose the correct preposition to complete each sentence.

1. We often have class meetings ___ Saturday mornings.
A. in
B. on
C. at

2. Children like playing games and running around ___ their break time.
A. at
B. on
C. to
D. in

3. The first day of school in Việt Nam is ___ September 5th.
A. on
B. in
C. at

4. Children are waiting for gifts ___ Christmas and ___ their birthdays.
A. on - at
B. in - on
C. at - on
D. during - at

5. When our parents were ___ work, we were learning ___ school.
A. at - at
B. in - at
C. in - in
D. at - in