Corruption is _______ problem in countries across the world, with developing countries often believed to be more serious, although there is no evidence to suggest this is _______case. 
#11233
A
a; the
B
the; a
C
不填; the
D
a; a
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In________,people in that village were very poor.
#10689
A
1920s
B
the 1920s
C
1920's
D
its 1920s
It was very kind of you to do the washing-up, but you _____ it.
#13892
A
needn’t do
B
shouldn’t do
C
mustn’t have done
D
needn’t have done
You can imagine what great trouble we had ______ the new school.
#13640
A
setting up
B
to set up
C
set up
D
to setting up