用适当的数词填空。
⑴There are ________ letters in English alphabet (字母表).
⑵There are ________ hours in a day.
⑶There are ________ days in a year.
⑷Monday is the ________ day of the week.
⑸There are ________ days in a week.
⑹There are ________ days in October.
⑺________ ________ is Christmas Day.
⑻There are ________ months in a year.
⑼Forty minus three is ________.
⑽There are ________ seasons in a year.