______recentresearchreportpublishedbytheUNindicatesthat...

問題詳情：

______ recent research report published by the UN indicates that it is quite possible that the earth’s temperature is rising well above ______ previous estimate.

A. The; a                      B. The; /                C. A; the                D. A; a

【回答】

知識點：冠詞

題型：選擇題