The moment seemed to ______ out endlessly, his gaze traveling across her face, her neck, her shoulder, returning to her eyes.

【正确答案】 A

【答案解析】stretch：延伸，指由短变长，由曲变直的伸展，常与介词out连用，stretch out：延长，拉长；expand：扩展，指尺寸的增加，范围和面积的扩大；skip：跳跃；slip：滑落。此处指时间由短变长。故选A。