If the machine makes a mistake -- ____ rarely happens -- it gives a warning in the form of a red light.
#77412
A
that
B
which
C
as
D
what
推荐题目
Tom's first job was at a local restaurant in his early twenties，________he worked for seven years.
#75556
A
where
B
when
C
which
D
that
The factory ________ we are going to visit produces computers.
#77696
A
which
B
to which
C
where
D
what
The discussion will go on until all the members reach the point ______they all agree on that issue.
#76973
A
which
B
where
C
that
D
when
—Do you have anything to say for yourselves?—Yes，there is one point________ we must insist on.
#75282
A
why
B
where
C
how
D
/