The computer is one of the greatest inventions in the __ century.(twenty)

问题描述:

The computer is one of the greatest inventions in the __ century.(twenty)

用序数词是对的,但是正确的写法应该是twentieth,所有表示几十的都是把基数词末尾的y变成i,再加eth.比如 thirty - thirtieth; forthy-forthieth; ninety-ninetieth