1.Were it not for the adoption of the open policy,things ______ they are today.A would never be B would never have been 選B該題為虛擬語氣,對(duì)過去的虛擬.另外從句 were it 是if it were的省略.主句需用would...第一題的條件從句是對(duì)現(xiàn)在的虛擬吧，因?yàn)閷?duì)過去的虛擬要用had been過去完成時(shí)，而第二句又是選對(duì)過去的虛擬，感覺好亂啊。還是不明白。。。1.發(fā)展是一個(gè)持續(xù)的過程，從過去持續(xù)到現(xiàn)在所以才會(huì)有：如果當(dāng)初沒有采取開放政策，事情（局面）不會(huì)是今天這樣（已經(jīng)發(fā)生）今天只是發(fā)展的一個(gè)段落，發(fā)展并沒有結(jié)束2.如果你早知道她計(jì)劃今天來，計(jì)劃是發(fā)生在過去的。所以，在理解一下