Use the correct prepositions at, in, on in the following sentences 1.Mozart was born ____ the eighteenth century. 2.It’s usually warm ____ October. 3.We don’t see each other very often, only ____ Christmas time and ____ the sum...

Use the correct prepositions at, in, on in the following sentences 1.Mozart was born ____ the eighteenth century. 2.It’s usually warm ____ October. 3.We don’t see each other very often, only ____ Christmas time and ____ the summer. 4.They don’t have lunch ____noon. 5.The students have a party ___ the end of the course. 6.Do you want to have a party ____ your birthday. 7.Summer begins ____ June 21st. 8.Do people go swimming ____ May? 9.Are you busy ____ the present time? 10.Do they have examinations ____ March? 11.Please return this book ____ couple of weeks. 12.The library has short hours ____ Friday. 13.What time does it open ____ Saturday mornings?