Which sentence is wrong?

A．The professor lives in the room whose windows face south.

B．Don’t enter the house its roof has been destroyed in the hurricane.(飓风)

C．We prefer the students who like challenging themselves.

D．I still remember the name of the village we visited last year.

我国天然气人均资源量仅为世界平均水平的( )。

A．7.1%
B．8%
C．9.1%
D．10.1%