【明報專訊】Leo 用 the number of units whose applications for extension have been approved來表達「已獲准擴充的單位數目」的意思，給上司改為the number of units where their applications for extension have been approved，想問 where 在這裏的用法。
Where 在這裏充當relative adverb 關係副詞，可看作是 in which、from which 或 at which等，故 Leo 上司於applications for extension 前加了 their，顯示 applications 從屬於 units。
The China-US trade war has come to a point where people are beginning to worry about the health of the global economy.
I went to my hometown in Guangdong last month where I got to see some of my relatives for the first time.
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