53. Simon has been training to swim ____ the Sun Moon Lake. He admits it’s tough.
(A) over
(B) on
(C) in
(D) across

across 平面( 距離較短)

across偏向橫渡或穿越的意思，through則是經由或經過的意思。結合前後文的來看會說橫渡日月潭而不會說經過日月潭，28題的從東南亞經由台灣海峽到日本，而不是橫渡台灣海峽，橫渡的話比較適用於從台灣across到對岸，其實這些結合文意都很好判斷的，不用去死背，文章看多題目寫多了有語感後自然都能反射出答案了

Simon has been training to swim aross the Sun Moon Lake. He admits it’s tough.

西蒙一直在訓練泳渡日月潭。他承認這很艱難。

例句:

Swim across Taiwan’s Sun Moon Lake to proceed as planned despite Typhoon Mangkhut.

Sun Moon Lake Weather Station chief says Nantou County will not be greatly affected by the typhoon.

儘管有颱風山竹，泳渡台灣的日月潭仍可按計劃進行.

日月潭氣象台局長說，颱風對南投縣影響不大.

(台灣英文新聞)

when you say "I saw him swimming through the river", it means that you saw the person swimming at any part of the river but when you say "I saw him swimming across the river" it means that you saw the person swimming in the river but at the same time crossing from one side of the river to the opposite side of it.

回四樓 有同樣疑問

選項中如果有through 那答案會是哪一個?