The key ___,he could not enter the room.A having been lost B had been lost C having lost D losing

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• The key ___,he could not enter the room.A having been lost B had been lost C having lost D losing
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• The key ___,he could not enter the room.A having been lost B had been lost C having lost D losing
• 1.absent-minded,he went to school on sunday,______it was monday.a.thought b.thinking c.while thinking d.to think2.the result of the contest was not made____to the public until yesterday.a.knowing b.known c.to know d.to be known3.___,so i had to wait for my parents back.a.because my key was lost b.my key was lostc.losing my key d.having lost my key
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