(2013·皖南八校聯(lián)考)________ here yesterday，he could have seen Jackie Chan.
A．If Bob has come　　B．If Bob came
C．If Bob had come　　D．If Bob should come
C
句意：如果Bob昨天來這，他就能見到成龍了。分析句意和句子結(jié)構(gòu)可知，此處表示與過去事實(shí)相反的虛擬，故從句應(yīng)用過去完成時(shí)。在虛擬條件句中，如果含有had，were，should等時(shí)，if可省略，句子倒裝，故此處的If Bob had come也可為Had Bob come。
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