entering the classroom, remember to take your seat and turn off your cell phone.A. AtB. Fr

发布时间：2020-08-17 09:43:57

    entering the classroom, remember to take your seat and turn off your cell phone.
A. At
B. From
C. Upon
D. As

网友回答

A. At
B. From
(答案→)C. Upon
D. As
解析：句意：一进入教室，记得坐下关掉手机。Upon+名词或动名词，表示“一…”，at“在…地方，听见…”，from“来自”，As“做为”，所以选C。
以上问题属网友观点，不代表本站立场，仅供参考！