it was in america ____she frist met Jack 填that when?which?

it was in america ____she frist met Jack 填that when?which?
it was in america ____she frist met Jack 填that when?which?

it was in america ____she frist met Jack 填that when?which?
that
强调句型It is/was ...that
这里强调她第一次遇到jack的地点,
可以改成简单句：she frist met Jack in america.

that
这里是"It is/was ... that..."强调句型

that
地点状语，when 和which 都不适合