[词汇联想]
一、基数词
zero, one, two, three, four, five, six, seven, eight, nine, ten
eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen
twenty, twenty-one
thirty, forty, fifty, sixty, seventy, eighty, ninety
one hundred, two hundred
one hundred and one, one hundred and thirty-five
one thousand, one million, one billion
