9．For some time now，world leaders _____ out the necessity for agreement on climate change，the world economy and African development．（　　）
A．had been pointingB．have been pointing
C．were pointingD．pointed

分析 一段時(shí)間以來(lái)，世界首腦都一直指出有必要就氣候變化，世界經(jīng)濟(jì)和非洲的發(fā)展問(wèn)題達(dá)成共識(shí)．

解答 答案：B．根據(jù)該句中的時(shí)間狀語(yǔ)for some time now可以看出，主句的動(dòng)作從過(guò)去某一時(shí)間開(kāi)始一直持續(xù)到現(xiàn)在，而且動(dòng)作可能還會(huì)延續(xù)，故應(yīng)該用現(xiàn)在完成進(jìn)行時(shí)．所以答案是B．

點(diǎn)評(píng) 考查現(xiàn)在完成進(jìn)行時(shí)．現(xiàn)在完成進(jìn)行時(shí)和現(xiàn)在完成時(shí)的第二種用法類(lèi)似，常和since，for引導(dǎo)的時(shí)間狀語(yǔ)連用．

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