句型 Is this your...? 及回答 — 英语选择题
题目
At the Lost and Found, a boy finds a watch. He asks three students: 'Is this your watch?' Amy answers, 'No, it isn't. It's Lily's.' Ben answers, 'No, it isn't mine.' Carl answers, 'Yes, it is. Thank you.' Whose watch is it? A. Amy's B. Ben's C. Carl's D. Lily's