Question

The policeman asked the boy ____

请问选A还是B？为什么呢？
The policeman asked the boy ____
A: Where was his mother B: where his mother was

Answer 1

为你解答。
The policeman asked the boy （B、where his mother was）.
警察问男孩他妈妈在哪。
解释：括号中是个宾语从句，要使用陈述的语序，即主语在前，动词在后。A项错在用了疑问的语序，动词was应该放在主语之后。

Answer 2

选B
因为where his mother was 在句子中是做宾语，要用陈述语序，因此选B

Answer 3

选B，where his mother was，做宾补的话was无需放前面，如果是where引导的疑问句就要选A