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--Icalledyoulastnight,butyoudidn’tanswer.  --Sorry,Grac...

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問題詳情:

--Icalledyoulastnight,butyoudidn’tanswer.  --Sorry,Grac...

-- I called you last night , but you didn’t answer.

  -- Sorry, Grace. I________I am A Singer when the phone rang.

  A. am watching         B. was watching       C. have watched

【回答】

B

知識點:動詞時態

題型:選擇題