两道关于定语从句的选择

题目

两道关于定语从句的选择
1.It is reported that two supermarkets,________ are being built in my city,will open next year.
A.which both
B.both of which
读起来觉得应该选B,但从语法上说they both=both of them,那这里两个选项岂不是一样的么?
2.He said that he would have finished the work by the end of October,________ personally I wondered.
A.which
B.for which
C.in which
D.about which
并翻译这句话
我说的很清楚的

答案

应该是AA
which 一般放在前边,除非是介词如for about in等
第二个wonder表示对...惊讶时是及物动词,前边不加介词