书籍 Total English - 初级 - 第 2 单元 - 第 3 课

the number 11

the number 12

the number 13

the number 14

the number 16

the number 17

the number 18

the number 19

the number 20

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 40

the number 50

the number 60

the number 70

the number 80

the number 90

of the number 100; the number of years in a century