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問題一二基本上是一樣的，the和s不衝突，然後我個人會自動用複數啦…有請英文大神開示能否用單數

我的理解是都會地區「房子」的價格，這樣當然是複數

問題三：高房價「早就已經」對社會產生重大影響，所以我會用完成式

早上才剛寫到，society詳解本寫不能加the

因為價格有很多種（？

In general, prices are closely related to the amount of currency in circulation.And......because it's currency, so that should be"have".It comes with present perfect tense because it istalking about the impact, which, of housing prices on society, is still going on.