He has no idea _________ she left without a word.
#34442
A
if
B
why
C
how
D
that
推荐题目
I think you’ve got to the point a change is needed , otherwise you’ll fail .
#33216
A
when
B
which
C
where
D
there
I was about to give up my effort to solve a problem __________ a good idea struck me.
#30835
A
when
B
while
C
until
D
before
He spoke with Clare, the telephone rang three times.
#32687
A
to which
B
during which
C
on which
D
for which