Helen ________ her keys in the office so she had to wait until her husband ______ home.
A．has left; comesB．left; had comeC．had left; cameD．had left; would come
C

試題分析：句意：海倫把鑰匙落在辦公室了，所以她得等自己的丈夫回家
根據(jù)主句和從句兩個(gè)動(dòng)詞的先后順序可以判斷，丟鑰匙在前，回家再后，且都為過去式，所以前者用過去完成時(shí)，后者用一般過去式
考點(diǎn):考察動(dòng)詞時(shí)態(tài)的用法
點(diǎn)評(píng)：動(dòng)詞時(shí)態(tài)一直以來都是全國(guó)各省高考考查的重頭戲，考生在此一定要多下工夫，將每一種時(shí)態(tài)的定義和用法吃透。平時(shí)，加強(qiáng)對(duì)該類題的練習(xí).
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