Вставь предлоги in, on, at. 1. We always go on holiday in July. 2. My parents usually go shopping On Saturday morning. 3. I always do my homework at the afternoon. 4. Our grandparents always come to visit us in winter.

Решение:

Вставляем предлоги в предложения:

1. We always go on holiday in July.
2. My parents usually go shopping on Saturday morning.
3. I always do my homework in the afternoon.
4. Our grandparents always come to visit us in winter.

Ответ: in, on, in, in.