He is very old, ______ he still works very hard.
#30921
A
but
B
if
C
when
D
as
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(2014·皖南八校联考)________ Yao Ming has retired from the NBA，the pleasure we have got by watching him play basketball at home and abroad will last long.
#30037
A
Although
B
If
C
Since
D
Once
Pop music is such an important part of society ______ it has even influenced our language.
#32668
A
as
B
that
C
which
D
where
We have decided to fulfill the task in time, difficulties we may meet with.
#32510
A
no matter how
B
however
C
whatever
D
whichever