[April 17] preposition ( IN, ON , AT) ,OF
[April 17] preposition PLACE TIME IN (longer period) - sby/sth is inside a place - bodies of wake (lake,river,swimming) - private transportation (car,taxi,truck~) - complete address of a place - names of cities, towns,countries - period of the day (expression)ex) in the morning / after noon (past/future) - months - years ( in 1990,in 2010) - century (in the 21st c) - season (in the summer) ON (s..