-Ididn'tseeyouatthebeginningofthepartylastnight. -I
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問題詳情:
- I didn't see you at the beginning of the party last night.
- I _____ on my biology report at that time.
A. worked B. work . C. was working D. am working
【回答】
C
知識點:動詞時態
題型:選擇題
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