与老师交往是学校生活的重要内容，同样要注重礼仪，下列属于与老师交往礼仪的是（  ）  

①礼貌待师   ②注意场合   ③勿失分寸   ④处理果断

A．①③④

B．②③④

C．①②③

D．①②④

— Well, I found this. I think it must be yours.      

— My watch! Thank you. Where ______ it? [ ]

A. do you find

B. have you found

C. did you find

D. were you finding