On June 19, 2001, an agreement was signed between the International Olympic Committee and the International Paralympics Committee to keep this 30 in the future.
答案：(D) practice
語意「保持這個做法/慣例在未來繼續下去」，指帕運和奧運在同一城市舉辦這件事，practice（做法/慣例）符合這個語境；piece／deadline／date 都不符合這裡「維持一個慣例」的語意。
practice 你腦中就是「練習」，還帶著「不夠熟所以要多練」的味道，所以 keep this practice 讀起來會很卡，這一格答對率只有 41%。practice 還有一個常考的名詞義：長期沿用下來的「做法、慣例」（劍橋詞典：something that is usually or regularly done, often as a custom）。104 年第 16 題考的是它的動詞義「習練、修習」（practice Tai Chi），本題考的是名詞義，同一個字的兩個方向都要記。
先確定 this 指什麼。空格所在的句子說國際奧會與國際帕拉林匹克委員會簽了協議，而前一句說自 1988 年首爾帕運起，帕運也開始在與奧運相同的城市舉辦——this 指的就是「在同一個城市舉辦」這個做法。所以空格要填的是一個能被 keep（維持）下去的抽象名詞，指一種持續沿用的安排。最後一句 From the 2012 bid onwards, the city chosen to host the Olympic Games will also host the Paralympics 更把這個做法寫成了往後的通則，是最強的文內佐證。
date（日期）最誘人，因為前後出現了 2001 年 6 月 19 日和 2012 年這些數字，但協議要維持的是「在哪裡辦」，不是某個日期；何況上文已說兩項賽事本來就在同一年舉行，年份不是爭點。deadline（截止期限）是最後期限，協議並不是在訂期限。piece（一片、一件）需要先有一個被切分的整體才說得通，這裡沒有。
a common practice（常見的做法）、in practice（實際上、實務上）、put sth into practice（把……付諸實行）、practice makes perfect（熟能生巧）、sign an agreement（簽署協議）、host the Games（主辦賽事）
The Paralympics are Olympic-style games for athletes with a disability. They were organized for the first time in Rome in 1960. In Toronto in 1976, the idea of putting together different disability groups 26 sports competitions was born. Today, the Paralympics are sports events for athletes from six different disability groups. They emphasize the participants' athletic achievements 27 their physical disability.
The games have grown in size gradually. The number of athletes 28 in the Summer Paralympic Games has increased from 400 athletes from 23 countries in 1960 to 3,806 athletes from 136 countries in 2004.
The Paralympic Games have always been held in the same year as the Olympic Games. Since the Seoul 1988 Paralympic Games and the Albertville 1992 Winter Paralympic Games, they have also 29 in the same city as the Olympics. On June 19, 2001, an agreement was signed between the International Olympic Committee and the International Paralympics Committee to keep this 30 in the future. From the 2012 bid onwards, the city chosen to host the Olympic Games will also host the Paralympics.