On the other side of the street stand more than 180 houses, are in poor condition nowA.

On the other side of the street stand more than 180 houses, are in poor condition now．
A. of which half
B. which half of
C. half of them
D. of them half

(答案→)A. of which halfB. which half ofC. half of themD. of them half解析：考查定语从句，用的是名词+of which引导的定语从句，先行词是more than 180 houses，half of which= half of more than 180 horses ，句意：在街道的另一边有180多间房子，其中一半状况很差选A。

这个答案应该是对的