【題目】The real reason why prices ____ and still are, too high is complex, and no short discussion can satisfactorily explain this problem.
A.were
B.will be
C.have been
D.had been

【答案】A
【解析】句意:過去和現(xiàn)在價格一直居高不下的真正原因很復(fù)雜,簡短的討論解釋這一問題無法讓人滿意。根據(jù)題干中“and still are”的提示可知過去價格也居高不下,故用一般過去時,表示過去的狀態(tài)。故選A項。

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