1. Underline the suitable preposition
a, I am talking ( about / to ) my school timetable next week.
b, I will have English and Literature ( on / in ) Mondays and Wednesdays.
c, ( On/In ) the afternoon, I usually play football with my classmate, from 3 ( until/ to ) 5.
d, The shelves ( at/on ) the left have Biology, Chemistry and Math books.
e, Every morning, I get ( up/on ) very early because I have classes ( until/at ) 7 o'clock.
f, ( Before / After ) storm comes a calm.
g, Leaves fall ( down / off ) trees ( in/on ) the autumn.