last year -----of new books were.a,the hundred b,hundred s c,one hundred

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lastyear-----ofnewbookswere.a,thehundredb,hundredsc,onehundredlastyear-----ofnewbookswere.a,thehundr

last year -----of new books were.a,the hundred b,hundred s c,one hundred
last year -----of new books were.
a,the hundred b,hundred s c,one hundred

last year -----of new books were.a,the hundred b,hundred s c,one hundred
选 b
固定用法.还有不清楚的可以追问.
没有a这种数字的用法
可以用 hundreds of ...
one hundred .
two hundred ...(此时hundred不加s )