, the boy couldn’t enter his house. A. Since the key had lost B. The key had been lost C——青夏教育精英家教网—

摘要： , the boy couldn’t enter his house. A. Since the key had lost B. The key had been lost C. Lost the key D. Having lost the key

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______,the boy couldn’t enter his house.

A.Since the key had lost　　　　 B.The key being lost

C.Lost the key　　　　 D.Having lost the key

_____, the boy couldn't enter his house.

A. Since the key had lost　　　　　　 B. The key being lost

C. Lost the key　　　　　　　　　　D. Having lost the key

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