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  • A scrum is a way of restarting a game of rugby union after an accidental infringement such as a .
Question 1:
A scrum is a way of restarting a game of rugby union after an accidental infringement such as a ........
A. knock on
B. knock out
C. knock up
D. knock off

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Phrasal idioms with the verb 'knock' | B2 – Upper-Intermediate