Jack and Susan______(know)each other since they were children,so nobody is surpised tohear they were married.A.had know B.have know

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Jack and Susan______(know)each other since they were children,so nobody is surpised tohear they were married.A.had know B.have know
Jack and Susan______(know)each other since they were children,so nobody is surpised to
hear they were married.A.had know B.have know

Jack and Susan______(know)each other since they were children,so nobody is surpised tohear they were married.A.had know B.have know
选B.动作从过去发生持续到现在或再延续.附合现在完成时概念.

B 认识到现在 现在完成时