大家好！……怎么用美语聊秘密？

keep it from someone 保守秘密，不告诉某人

Baijie. How could you!?

白洁，你怎么能这样？

What..?怎么了？

You decided to move to Beijing without telling me! How could you keep it from me?

你决定搬到北京，都没有和我说一声！你怎么能不告诉我呢？