【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】

試題分析：本題考查動(dòng)詞時(shí)態(tài)。

結(jié)合句意“過(guò)去價(jià)格太高，現(xiàn)在仍然太高的原因很復(fù)雜...”可知，此處 and 連接兩個(gè)并列的系動(dòng)詞，后者是對(duì)現(xiàn)在事實(shí)的描述，為一般現(xiàn)在時(shí)；前者是對(duì)過(guò)去事實(shí)的描述，應(yīng)用一般過(guò)去時(shí)，又主語(yǔ) prices 為復(fù)數(shù)，故用系動(dòng)詞用 were，A項(xiàng)正確。will be 為一般將來(lái)時(shí)，have been 為現(xiàn)在完成時(shí)，had been 為過(guò)去完成時(shí)，均不符合句子時(shí)態(tài)。故正確答案為A。

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