They have a small apartment the third floor of a apartment block.
A. in ; five- storey
B. on ; five-storey
C. on; five storeys
D. in ; five storeys
网友回答
A. in ; five- storey
B. on ; five-storey
C. on; five storeys
D. in ; five storeys
解析：句意：他们在一个五层公寓楼的三楼有一个小套房。在三层楼上，应该用on the third floor; 要用“五层的”做定语，可以说：five-storey 或five-storeyed。