名词所有格这个用法对不对： the price of a house 能不能用a house

1.
The
price
of
the
house;
The
price
of
the
book=这套房子;这本书
2.
The
price
of
a
house
has
gone
down;
The
price
of
a
book
has
gone
up:
虽然没有错,但不是很理想的句子;不常用..
3.
比较常用:
The
price
of
[houses]
has
gone
down;
House
prices
have
gone
down;
The
price
of
[books]
has
gone
up.
Book
prices
have
gone
up.
4.
不常用:"The
price
of
a
house
in
Beijing/Taipei/Tokyo
is
not
affordable
nowadays."
5.
比较常用"
"House
prices
in
Beijing/Taipei/Tokyo
are
not
afforadable
nowadays."

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