However, these 28 less than 50% of the GDP now that Bhutan has become an exporter of hydroelectricity.
答案：(C) account for
account for（占……比例）為固定搭配，在此表示傳統產業如今僅占國內生產毛額（GDP）不到一半；figure out（想出）、relate to（與……有關）、conform to（遵從）均不符合此處統計數據的語意。
四個選項都是「動詞加介系詞」的片語，形態一樣，你會憑中文挑一個。
答對率四成七。這是指標勾環：先問句首的 these 指的是什麼——前一句列的 forestry, animal husbandry and subsistence agriculture（林業、畜牧業與自給農業）這三個傳統產業。接著看空格後面：less than 50% of the GDP（國內生產毛額的不到一半），是一個比例。主詞是幾個產業、後面接一個比例，要的就是「占多少比例」這個說法——account for。填進去讀成 these account for less than 50% of the GDP（這些如今只占國內生產毛額不到一半）。account 這個字有好幾種用法，這裡是「占比例」，另外還有「說明原因」（That accounts for his absence.）與名詞的「帳戶」。
figure out（想出、弄懂）後面接的是被弄懂的問題；relate to（與……有關）只說得出有關聯，講不出比例；conform to（遵從、符合）後面接的是規則或標準。三個都是片語動詞，形態吻合，容易被順手選走。
now that ＋ 子句（既然、由於）、figure out（想出、弄懂）、conform to（遵從、符合）、relate to（與……有關）、hydroelectricity（水力發電）、less than half（不到一半）。
The Kingdom of Bhutan is a landlocked nation situated between India and China. The entire country is mountainous, 26 a small strip of subtropical plains in the extreme south. The elevation gain from the subtropical plains to the glacier-covered Himalayan heights exceeds 7,000 m.
Its traditional 27 is based on forestry, animal husbandry and subsistence agriculture. However, these 28 less than 50 of the GDP now that Bhutan has become an exporter of hydroelectricity. Besides, cash crops and tourism are also 29.
Bhutan is one of the most isolated nations in the world, 30 foreign influences and tourism regulated by the government to preserve its traditional Tibetan Buddhist culture. It is often described as the last surviving refuge of traditional Himalayan Buddhist culture.