The highest mountain pass in Europe is _______.

问题描述:

The highest mountain pass in Europe is _______.
answer1,at 2000 metres high
answer2,2000 metres high
which answer should i choose?why?(不是作表语的既可用名词,也可用介词短语吗)

answer2,2000 metres high
不是用名词或者介词短语的问题,而是,有多高的表达是 数字+单位+形容词