"我们会跟你联系。"

Translation: We will contact you.

[jpearse]

"We will be in touch with you." should be accepted.

[Semeltin]

Or "We will get in touch with you".

[MelvinCheah]

Bit more colloquial, but I agree.

[Patrick_Dark]

"聯係" is translated as "keep in touch" in another exercise in this lesson, so it seems reasonable to accept "We will keep in touch with you." Unfortunately, that answer is rejected.

[Semeltin]

I think the "keeping" part comes from 保持。 That's why I think 保持联系 should be: keep in touch and 会。。。。。。联系: get in touch

Oops, there is also this sentence:
"希望我们以后多联系。 "
Translation: I hope we keep in touch more often in the future.
I think the English translation doesn't really work well and I do see a difference to this sentence because "我们会跟你联系。 " seems to be about them establishing contact. But you're right Duolingo translates "聯係" as "keep in touch" in that sentence.

[FuCnSW]

Keep in touch “保持”聯繫/聯絡

Contact 聯繫/聯絡

In Chinese, keep means 保持, usually when we say 保持聯繫, we translate to keep in touch. Though, I don't see very much different between them in Chinese, maybe in English they are different. So, in this example, I tend to use contact.

[KX3.]

It is reasonable, but I agree with FuCnSW as well.

[WillowsofXihu]

Don't call us...