60 seconds = (A) 1 minute.
60 minutes = (An) 1 hour.
24 hours = (A) 1 day.
7 days = (A) 1 week.
14 days = (A) 1 fostnight.
28 days = Regular year - FEBRUARY / 29 days = Leap year - FEBRUARY.
30 days = (A) 1 month - APRIL, JUNE, SEPTEMBER, NOVEMBER.
31 days = (A) 1 month - JANUARY, MARCH, MAY, JULY, AUGUST, OCTOBER, DECEMBER.
365 days = (A) Regular year / 366 days = (A) Leap year.
12 months = (A) 1 year.
10 years = (A) 1 decade.
100 years = (A) 1 century.
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English Grammar Tips (I)
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