Lily _________ an e-mail to her parents after she arrived in Beijing.

A. cooked B. lost C. sent D. reached

C

句意“李莉到达北京后向她的父母发了邮件”。A.做饭；B.丢失；C.发送；D.到达。根据句意可知，译为“发送邮件”，故选C。