Was it in the hotel where he stayed last week ( ) he lost his cellphone
A that B when C where D which
这个选择A这是一个强调句 It was in the hotel (that) he lost his cellphone.
That house,( ) my father,is being repaired
A belonged to B belonging to C belongs to D is belonged to
这里说的是belong to,而且前面用的是
The house is being repaired.The house belongs to my father.
这里belonging to是一个分词短语做定语,
答案为B