Collocations with matter

Which of the following is a common collocation that describes

. N1. a matter that needs to be dealt with quickly

an urgent matter
a speedy matter
a demanding matter

. N2. a matter that is not important

a slight matter
a light matter
a trivial matter

. N3. an important matter

a deep matter
a severe matter
a serious matter

? Which word best completes the sentence

. N4. I didn’t want to _________ the matter in front of everyone else

open
rise
raise

. N5. There’s a meeting next week at which we hope to ____________ the matter

answer
clear
settle

: Answers

N1.an urgent matter
N2.a trivial matter
N3.a serious matter
N4.raise
N5.settle