It was last October they finally came back to their hometown.A. whenB. that C. what D. un

问题补充：

It was last October they finally came back to their hometown.

A. when

B. that

C. what

D. until

答案：

A. when

(答案→)B. that

C. what

D. until

解析：考查强调句型。本题强调句型强调的是时间状语last October.句意：就是去年10月份，他们终于回到了故乡。故B正确。