15．The Williams moved to a safer area and since then they ______ back to their past life．（　�。�
A．hadn't lookedB．didn'tlookC．wouldn't lookD．haven't looked

分析 威廉姆斯一家人搬到了一個(gè)更加安全的地方，而且自那以后他們?cè)傥椿仡^看他們過(guò)去的生活．

解答 答案：D
解析：A：過(guò)去完成時(shí)；B：一般過(guò)去時(shí)；C：過(guò)去將來(lái)時(shí)；D：現(xiàn)在完成時(shí)．根據(jù)橫線前面的"自從那以后（一直到現(xiàn)在）"可知本題該使用現(xiàn)在完成時(shí)（表示從過(guò)去某一時(shí)間點(diǎn)發(fā)生的動(dòng)作一直持續(xù)到現(xiàn)在），因此結(jié)合所給選項(xiàng)分析可知本題答案為D選項(xiàng)．

點(diǎn)評(píng) 本題考查時(shí)態(tài)，做此類題題目時(shí)一定要仔細(xì)分析句子結(jié)構(gòu)并結(jié)合句意確定句子所需時(shí)態(tài)；再結(jié)合選項(xiàng)分析及其它要求選出最終答案．

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