1. He waited, and sweated from fear of seeing the owner, who hardly ever came out.
他等着，因为害怕见到主人而吓得出了冷汗，房子主人很少出门。(who引导一个非限制性定语从句)
2. It seemed he was very lonely. 看上去他很孤独。
（it作形式主语，that从句为真正主语, 在句中that已省略）
3. I do have a magazine here for collectors.
