Prepositions at, in on

Fill in the gaps with the prepositions at, in, on

Don't call me __ 12-00. I will be at the meeting.

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Could you come ... Monday?

Fill in the gaps with the prepositions at, in, on

They are coming to visit us __ September.

Fill in the gaps with the prepositions at, in, on

She went to the supermarket __ the morning.

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I will give the answer __ 20 July.

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Somebody was singing loudly __ midnight.

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The shop closes __ 8pm.

Fill in the gaps with the prepositions at, in, on

. It will be quite cold there __ winter.

Fill in the gaps with the prepositions at, in, on

He is playing tennis __ Sunday.

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We are going to see her parents __ the weekend.