With Present perfect Continuous, not easy...

[Storm]

Please help me with the fill-in things here...

Matt and Sarah 16. ___________ (have) some difficulties in their relationship lately, so they 17.___________ (go) to a marriage counselor yesterday. I hope they 18.___________ (work) everything out soon.

[Mister Micawber]

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Hello, Storm-- and welcome to English-Test.net.

I'd like to see you try first to supply answers, and then we'll check your efforts.
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Native English teacher at Mister Micawber's

[Storm]

I would try as you may view in the <...> below:

Matt and Sarah <have been having> (have) some difficulties in their relationship lately, so they <went> (go) to a marriage counselor yesterday. I hope they <will work> (work) everything out soon.

[Mister Micawber]

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Those are good answers, storm. If the word 'yesterday' were not in the sentence, then you could use present perfect continuous there, too:

Matt and Sarah have been having some difficulties in their relationship lately, so they have been going to a marriage counselor. I hope they work everything out soon.
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_________________
Native English teacher at Mister Micawber's

[Storm]

I am appy with the clarification.
I just like it here that people help me.