Question

The man didn’t know _________ the thief broke into the house and stole all his valuable things  

A．it was when that

B．when it was that

C．that it was when

D．was it when that

Answer 1

B

考查宾语从句，此题的宾语从句为特殊疑问句的强调句型，应用陈述句语序，句意：这个人不知道究竟是什么时候小偷闯入了房子偷走了他所有贵重的东西。所以选B。