When a disaster occurs, all people, ________ they are old or young, rich or poor, try their best to help those in need.
#32038
A
no matter
B
whether
C
however
D
even though
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This pen is ___ mine, ___ his.
#79757
A
never, except
B
nor, also
C
not, but
D
not, or
6. _____ I suggest, he always disagrees. 
#80144
A
however
B
whatever
C
Whichever
D
Whoever