The changes in the city will cost quite a lot, ___________they will save us money in the long run.

A.  or              B. since         C. for          D. but

D


解析:

本題考查并列連詞or、for、but和從屬連詞的意義和用法。并列連詞or通常表示選擇關(guān)系；for表示因果關(guān)系；but表示轉(zhuǎn)折關(guān)系；從屬連詞since表示原因。通過(guò)比較前后兩個(gè)分句意思可知，它們是轉(zhuǎn)折關(guān)系。

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