The post office is on the right of the library.You can send ( )to your friends there.

问题描述:

The post office is on the right of the library.You can send ( )to your friends there.
A.e-mails B.address
C.e-cards D.letters

选d,题目中post office是邮局,寄信的,a是电子邮件,b是地址,c是电子贺卡的意思望采纳