问题补充：
They are living with their parents for the moment because their own house .
A. is being rebuilt
B. has been rebuilt
C. is rebuilt
D. has rebuilt
答案：
(答案→)A. is being rebuilt
B. has been rebuilt
C. is rebuilt
D. has rebuilt
解析：考查时态，由前面的句子They are living with their parents for the moment可以知道是进行时，因为名词own house和动词rebuild是动宾关系，所以用被动式，所以选A
