12．Last Sunday my aunt ______ at home with me．We were watching TV all day．（　�。�
A．wasB．wereC．isD．are

分析 上星期天我的姑姑和我在家，我們整天都在看電視．

解答 答案：A．根據(jù)時間狀語last Sunday可知，本句是一般過去時態(tài)，主語是my aunt是單數(shù)形式，所以系動詞用was．故選A．

點評 本題考查系動詞的用法，要根據(jù)主語的單復(fù)數(shù)形式以及時態(tài)來確定系動詞的正確形式，達(dá)到熟練運(yùn)用的目的．

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