3 Write the correct preposition.

Решение:

Нужно вставить предлоги in, at или on в зависимости от времени.

• at seven o'clock
• on Saturday
• at night
• in 2009
• in summer
• in the morning
• on Sunday morning
• in July
• at the weekend
• in the twentieth century

Ответ: at, on, at, in, in, in, on, at, in.