He has no idea _________ she left without a word.
#34442
A
if
B
why
C
how
D
that
推荐题目
The man,_______ is often parked in front of our house, is a famous surgeon.
#34717
A
who’s car
B
of which the car
C
the car of which
D
whose car
  It will be a long time ______- he returns.
#34588
A
until
B
before
C
when
D
after