選A through
首先鄙視一下B,完全不符合句子的意思.那么就比較其他3個
through,across和over的區(qū)別
①、through：穿過
I threw it through the window.
Is it quicker to drive round the town,or straight though the centre?
②、across:from one side to the other
（在平面上）越過,在/到……對/面,橫過.
I can’t swim across the river.
我不能游到河對岸.
He went across the hall to the door.
他越過大廳到門口.
③、over:翻越過
across和over兩者都表示從一側(cè)向另一側(cè)的運動：
She drove over /across the bridge.
但如果越過的是一個高的物體,則用over:
He climbed over the wall.
如果越過的是一個平面,則宜用across：
He went across the hall to the door.
across和through都表示“穿過”,“通過”的意思,across表示從物體表面“穿過”、“通過”;而through則表示從內(nèi)部“穿過”、“通過”.