More people live alone, our homes will become smaller.
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We will need flexible space and multi-functional rooms.
In the future windows will have glass which is clear but turns dark when electricity passes through it.
Nijo castle was used as an imperial palace for a while in ___?
A. 1687
B. 1837
C. 1867
D. 1873
Lake Ashi is famous for the view of Mount Fuji and its numerous____.