1．It would be very safe if you      the door        to the garden．（　　）
A．fasten；ledB．will fasten；leads
C．fastened；leadingD．fastened；to lead

分析 如果你將通往公園的門加固，那會(huì)很安全的．

解答 答案：C
根據(jù)句意可知，本句是虛擬條件句；由于主句使用了"would+動(dòng)詞原形"，故if從句表達(dá)的應(yīng)是與現(xiàn)在事實(shí)相反的情況，需要使用一般過去時(shí)fastened；"        to the garden"在句中作名詞door的后置定語(yǔ)，由于該名詞與動(dòng)詞lead構(gòu)成了主謂關(guān)系，意為"通往公園的門"；所以這里應(yīng)使用現(xiàn)在分詞形式；故選C．

點(diǎn)評(píng) 本題考查虛擬條件句以及現(xiàn)在分詞作定語(yǔ)的用法；做本題時(shí)，首先應(yīng)根據(jù)句意以及主句謂語(yǔ)部分的表現(xiàn)形式，判斷出該句是虛擬條件句，表達(dá)的是與現(xiàn)在事實(shí)相反的情況；從而確定出從句應(yīng)使用的時(shí)態(tài)；因此，需要熟練掌握虛擬條件句的意義及用法；其次還應(yīng)掌握動(dòng)詞的現(xiàn)在分詞的作定語(yǔ)的用法．

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