Talk about getting in touch

Ben: Have you broken the news to the family yet?

Emily: Well. I've been in touch with most of them, but I can't get hold of Uncle Nick.

Ben: No, I haven't heard from him for a while either. Try giving his office a ring.

Emily: I did, but he's not there at the moment, so I've had to drop him a line.

Ben: OK. So, shall I keep quiet about your move until it's common knowledge?

Emily: Yes, please. I don't want anyone to feel they've been kept in the dark.

Sure. I promise I won't breathe a word.

break the news (to somebody)

be the first to tell somebody about some important news, usually bad news

The doctor had to break the news to Jane about her husband's cancer.

be in touch with somebody

if you are in touch with somebody, you are in contact with them by speaking or writing to them

Are you still in touch with John?
你和 John 还联系吗？

get in touch with somebody

if you get in touch with somebody, you make contact with them

Can I have your phone number in case I need to get in touch with you?

keep in touch with somebody

if you get in touch with somebody, you continue to have contact with them
保持联系

I met him when I worked in Madrid, and I’ve kept in touch with him ever since.

lose touch with somebody

if you lose touch with somebody, you no longer have contact with them

I’ve lost touch with all my old school friends.

get hold of somebody

to find and speak to someone about something
找到某人，联系上某人

I must get hold of Vanessa to see if she can babysit.

hear from somebody

to receive news or information from someone

I look forward to hearing from you.
我盼望着你的来信。

give somebody a ring

informal
to make a telephone call to someone

I’ll give you a ring later in the week.

drop somebody a line

to write a short letter or email to someone
给某人写短信或发电子邮件

So if there are any problems drop me a line.

keep something quiet/keep quiet about something

say nothing about something
to keep information secret

I've decided to resign but I'd rather you kept quiet about it.

be common knowledge

to be something that everyone knows, especially in a particular community or group

It is common knowledge that travel broadens the mind.

keep somebody in the dark

if you keep somebody in the dark, you don't tell them about something important

not breathe a word

to not tell anyone anything at all about something, because it is a secret
不透露风声

Don’t breathe a word; it’s supposed to be a surprise.