in / on

1. __ in___November (in / on)
2. __ in___Spring (in / on)
3. ___ on __Sunday (in / on)

2011-05-14 09:00:11 補充：
AT: at 5 o'clock, at night, at noon, at Christmas

IN; in the evening, in the morning, in the afternoon, in March, in 1997, in 20th century, in summer

ON: on Monday, on Monday morning, on March 15th, on Christmas Day, on your birthday

1. _IN____November (in / on)
2. __IN___Spring (in / on)
3. _ON____Sunday (in / on)

Rules is in a week, in a month, in a year, in a season, in the morning, in the afternoon, in the evening
on a day, On Sunday
at twelve O'clock