G5 Time expressions

There are (a)   seconds in a minute.

There are (a)   minutes in an hour.

There are (a)   hours in 1 day.

There are (a)   days in 1 week.

There are about (a)   weeks in 1 month.

There are (a)   days in a normal February.

There are (a)   days in April, June, September and November.

There are (a)   days in January, March, May, July, August, October and December.

There are (a)   years in a decade.

There are (a)   years in a century.