"The Ten-thousand-li Great Wall"

问题描述:

"The Ten-thousand-li Great Wall"
It is more than 6,000 kilometres long.It is 6-7 metres_____ and 4-5 metes from side to side.
A tall B the tall C higher D high
填哪个?为什么?

D high
物体的高用high ,人,树等有生命的高用tall ,所以D正确.