A scientific report has found that snow and ice on Africa’s highest mountain Kilimanjaro ______rapidly and could vanish within 20 years.   

A．has been meltedB．will melt
C．is meltingD．was being melted

C

解析試題分析：句意：一份科學(xué)報(bào)告表明：非洲最高的山脈乞力馬扎羅山上的積雪和冰層正在快速融化，并可能在未來20年內(nèi)徹底消失。表示現(xiàn)在正在進(jìn)行的動(dòng)作，故用現(xiàn)在進(jìn)行時(shí)。
考點(diǎn)：時(shí)態(tài)考查題
點(diǎn)評(píng)：這種用法往往表示發(fā)生在過去，說話時(shí)沒完成，仍在繼續(xù)進(jìn)行的動(dòng)作或狀態(tài)。做題時(shí)可以從上下文推斷應(yīng)選用的時(shí)態(tài)。主句用了現(xiàn)在完成時(shí)，從句中不會(huì)用過去進(jìn)行時(shí)，從句中后半句中用了將來時(shí)，那么前半句就應(yīng)該比將來時(shí)早一步，即“現(xiàn)在”，選項(xiàng)中A是現(xiàn)在完成時(shí)，C是現(xiàn)在進(jìn)行時(shí)，根據(jù)主語和動(dòng)詞的關(guān)系可以排除A。

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