he began to learn English in his ----- a.thirtieth b.thirty c.thirty‘s d.thirties
问题描述:
he began to learn English in his ----- a.thirtieth b.thirty c.thirty‘s d.thirties
为什么不能是b
答
在某人几十几岁时的表达是in+one's+基数词的复数.例如在他三十几岁即in his thirties.三十岁 不行吗