He left the key ______ he had been an hour before.
#67945
A
what
B
that
C
where
D
which
推荐题目
There comes a time in every man's life_____. 
#72352
A
that he needs to think
B
when he has to think
C
therefore he has to work hard
D
then he will need it
 This is the very knife _____ I used to cut apples yesterday.
#73482
A
that
B
by which
C
which
D
with which