　　　youtalktosomeoneorwriteamessage,youshowyourskillsto...

　　　you talk to someone or write a message, you show your skills to others.

A. At times B. Some time

C. Every time D. The time

【解析】選C。句意:每當你和別人談話或寫東西時, 你都在向別人展示你的技能。every time/each time引導時間狀語從句, 意為 “每當……” , 其他三項都不能引導時間狀語從句。