You can take any seat _____is free .   
#72956
A
where
B
which
C
that
D
in which
推荐题目
Those were the graduate assistants ______ to do the research work in the lab.
#73726
A
to whom it was their responsibility
B
whose responsibility there was
C
whose responsibility was
D
of whom with the responsibility
 Copy the expression___, please, without any change.
#66602
A
as it is
B
such as it is
C
what it is
D
so it is