呢幾句句子有咩分別?

The solution :
以下只是我的估計，請勿過分抄襲 ~
1 ) How come he can approach her thus ?
A : 為何他可以這麼接近她呢 ?
2 ) How come he can approach her thus and thus ?
A : 為何他可以愈來愈接近她呢 ?
3 ) How come he can approach her thus and so ?
A : 之所以他能那麼接近她，是什麼的一回事呢 ?

詞語的解釋 :
1 ) approach = 接近
2 ) thus = 這麼 / 那麼
3 ) thus and thus = 愈來愈