Their wish is()a house of their own 选择

问题描述:

Their wish is()a house of their own 选择
to have
for having
have
of having
请问选哪个理由说下

正确答案为:
to have
be to do sth 表示要去做,但还没做
这句话翻译为:
他们的梦想是拥有一个他们自己的房子.
因为是梦想,所以是还没做到