It is still a problem ______ to hide the stolen money. 
#23427
A
why
B
which
C
where
D
who
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Such a problem is____difficult for a primary school student ___. 
#24944
A
so; to work
B
very too; to work out
C
rather too; to work out
D
quite too; to answer
So hard did he work that he __________made himself ill for a whole week. 
#23457
A
merely
B
annually
C
eventually
D
fortunately