WecalledonTomathisofficethismorning.改为强调句（对划线部分强调）划线部分为called

Question

We called on Tom at his office this morning.改为强调句（对划线部分强调）
划线部分为called

Answer 1

It was at his office that we called on Tom this morning
It was this morning that we called on Tom at his office.
It was Tom that we called on at his office this morning.