It is really difficult to there few flats among so many people.A. separateB. divide inC.

问题补充：

It is really difficult to there few flats among so many people.

A. separate

B. divide in

C. separate up

D. divide up

答案：

A. separate

B. divide in

C. separate up

(答案→)D. divide up

解析：divide up是分割的意思。