■此題其實選 that 也不算錯，只是不如 the one 普通。

一般說來，the one與that均可表特指，但前者只用于替代單數可數名詞，而后者則可用于替代可數或不可數名詞，所以當用于替代不可數名詞時，只能用that，不能用the one。當它們用于替代單數可數名詞時，許多人認為其區別是：當后面接有后置定語作修飾語時，一般要用 the one，不用 that。如：　　

Mine is the one on the desk. 我的放在桌上。　　

My room is better than the one next door. 我的房間比隔壁房間好。　　

He said he would have the one near him. 他說他要靠近他的那一個。　　

Open the drawer on the left, the one with a key in it. 打開左邊的抽屜，上面有鑰匙的那個。　　

A letter sent by airmail should arrive sooner than the one sent by ragular mail. 航空信應該比平信到得快。　　

that有時也接后置定語，但主要限于 of  短語。如：　　

The weather of Beijing is colder than that of Guangzhou. 北京的天氣比廣州冷。　　

Output of coal was four times as great as that of last year. 煤產量比去年增加了3倍。　　

The military budget of that year is thirty times as large as that of 1950. 那年的軍事預算是1950年的三十倍。　　

The dialect of one town may be quite different from that of the next town. 一個城鎮的方言與鄰近城鎮的方言可能完全不同。　　

其實，the one 后接 in 引出的介詞短語也是可能的。如下面兩句均摘自《牛津高階英漢雙解詞典》第6版：　　

The approach taken by US courts has been more progressive than that in Britain.

The situation in the US is not directly comparable to that in the UK.　　

■上句中用 in the shop 和 at the shop 都不算錯，用 in，指在商店里面，用 at 是把商店作為一“點”來看待。只是說話者所用的角度不一樣。　　

■rather than 可視為連詞和介詞，若視為連詞，應連接兩個兩個平行的動詞形式；若視為介詞，后接動詞，應用動名詞形式。在此句中，無論將 rather than 視為連詞還是介詞，都應將 stay 改為 staying 更恰當些。