словарь английский - английский
- happen unexpectedly на английском языке:
1. 
crop up
The issue has continued to crop up in the 2000s.
I used these skills to help me with problems which crop up evry day
Английский слово "happen unexpectedly«(crop up) встречается в наборах:
Phrasal verbs 1- I class II semesterphrasal verbs 1
Phrasal verbs 1
Phrasal verbs 2
