---Has Ingid handed in her paper yet?
---I’m not sure. She _______ on it last week.
A．was workingB．has workedC．workedD．had worked
Ａ
考查時態(tài)。根據(jù)句意可知上個星期她在寫論文。指在過去的一段時間內正在做的事情，所以用過去進行時。句意：—Ingid的論文交了嗎？—我不確定。上個星期她還在寫。
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