书籍 Top Notch 基础A - 第 4 单元 - 第 3 课

the number 21; the number of days in three weeks

the number 22; the number of players on two soccer teams

the number 23; the number of pairs of chromosomes in the human body

the number 24; the number of hours in a day

the number 25; the number we get when we multiply five by five

the number 26; the number of letters in the English alphabet

the number 27; the number you get when you multiply three by three by three

the number 28; the number that is equal to twenty plus eight

the number 29; the number of days in February when the year has one extra day during a leap year

the number 30

the number 31; the number of days in January, March, May, July, August, October, and December

the number 32; the number of teeth an adult has

the number 40

the number 50

the number 60

the number 70

the number 80

the number 90

the number 100

the number of years in a century plus one