Complete the sentences with at, on or in. Write down full sentences.

Stars shine brightly _____ night _____ summer.
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People don’t work _____ the weekends and don’t wake up early as _____ the weekdays.
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Sarah isn’t here _____ the moment.
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My test is _____ Wednesday _____ 9:30 _____ the morning.
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We started an exam _____ the same time, but I finished it _____ a half an hour.
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Write down full sentences, not just the preposition. Underline the prepositions you have chosen. Запишите предложения полностью, а не только предлог. Подчеркните предлоги, которые вы выбрали.