18. 通讯 Communications

（61）写信 Writing letters

polite address language, address, postman, stamps, post office, mailbox

（62）打电话 Making phone calls

Hello, this is … / may I speak to …? ,

wait a minute, sorry, please call again at …, hold on please, the line is busy, can I take a message, I’m sorry to keep you waiting

（63）使用互联网 Using the Internet

Website, QQ, We chat, shopping online, artificial intelligence (AI) , big date