My home is ______on foot away from my school A,twenty -minute B.twenty minutes' 选什么,

问题描述:

My home is ______on foot away from my school A,twenty -minute B.twenty minutes' 选什么,
关键是on foot 指的是步行吗
twenty -minute是形容词,不能修饰on foot
谁能给我一个铁定的答案!

没有正确答案,应该是twenty minutes
twenty-minute是个复合形容词,在句子中只能作定语,不能作表语
twenty minutes' 后面要加time一词才行