Do we use these time expressions with in, on, or at?
Ответ:
1. at ten o'clock, 2. on Monday, on Tuesday, 3. on Monday morning, on Tuesday afternoon, 4. at the weekend, 5. at Christmas, at Easter, 6. in January, in February, 7. in May, in June, 8. in the summer, in the winter, 9. in 1990, in 1992, in 2001.