Passing through和passing by ??

passing through和passing by 的差別在哪裡??

有一題目如下:
He said he was ______ Taipei and would like to visit me.
(A) passing on (B)passing through (C)passing by (D) passing along

可以解釋一下以上各選項的意思和用法嗎?
及這題的答案

感激不盡^^ ~~~
3 個解答 3