1. Вставь предлоги in, on, at в предложения, если нужно: 1) We went to the mountains ___ last summer. We went to the mountains last summer. 2) We go to the river ___ summer. 3) They’re going to the camp ___ next summer. 4) Pupils go to school ___ every day. 5) We don’t go to school ___ the weekend. 6) I’m working hard ___ this week. 7) We went to the cinema ___ May. 8) My sister does morning exercises ___ the morning. 9) We play tennis ___ Wednesday morning. 10) My birthday is ___ 6th May.

1. We went to the mountains — last summer. We went to the mountains last summer.
2. We go to the river in summer.
3. They’re going to the camp — next summer.
4. Pupils go to school — every day.
5. We don’t go to school at the weekend.
6. I’m working hard — this week.
7. We went to the cinema in May.
8. My sister does morning exercises in the morning.
9. We play tennis on Wednesday morning.
10. My birthday is on 6th May.

Предлоги времени: in употребляется с месяцами, временами года и частями дня; on — с днями и датами; at — с выражением at the weekend. Перед словами last, next, every, this и обстоятельствами every day предлог не ставится.