Peter went to a concert _______ his favourite band played and sang.
#77419
A
which
B
for which
C
at which
D
in which
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I just wonder _______that upsets him so much.
#78075
A
what it is
B
what he does
C
how it is
D
why it does
She is the only one of the persons ________ from the mistakes.
#78522
A
whom I know have learned
B
whom I know has learned
C
I know who has learned
D
I know who have learned