单选题 She refused to______the car key to her husband until he had promised to wear his safety belt.
【正确答案】 D
【答案解析】解析：句意：她的丈夫承诺系上安全带后，她才把车钥匙交给他。本题考查动词词组辨析。hand over表示“交出，移交”。因此本题应选D项。hand in表示“上交，呈交”，多用于下级对上级。hand out分发，散发，施舍。hand down宣布，传递，代代相传。