13．So far a large number of houses________for those who lost their homes in the powerful earthquake．（　　）
A．have been builtB．to be builtC．being builtD．had been built

分析 到目前為止已經(jīng)建造了大量的房子提供給在大地震中失去家園的那些人．

解答 答案：A
句中build與houses構(gòu)成動賓關(guān)系，要用被動語態(tài)；so far到目前為止，表示已經(jīng)完成的動作，要用現(xiàn)在完成時態(tài)來表示．故選A．

點評 現(xiàn)在完成時表示過去發(fā)生的動作對現(xiàn)在造成的影響或結(jié)果或表示過去的動作或狀態(tài)持續(xù)到現(xiàn)在．用法有：過去發(fā)生的某一動作對現(xiàn)在造成的影響或結(jié)果或到現(xiàn)在為止已經(jīng)發(fā)生或完成的動作；表示過去發(fā)生的并且持續(xù)到現(xiàn)在的動作或狀態(tài)．

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