The doctor let the patients ______the soft music, because it helped make them _____.
试述我国《电子签名法》的主要特点。
The baby always sleeps with his eyes half_____ .
文件型病毒是寄生在以下哪类文件中的病毒?（）
--Can I speak to Mr Smith, please?
--_________. He is giving a talk at a meeting.
