——Who       it be that is knocking at the door?——It       be Father, but I’m not sure. 
#85013
A
can; must
B
can; may
C
must; can
D
may; must
推荐题目
I can’t remember ______ I met the man. 
#85471
A
where was it
B
it was where  
C
where it was that
D
where was it that
Was it at the school ______ was named after a hero _____ he spent his childhood?
#84975
A
which; that
B
where; where
C
that; where
D
which; where
It was ______ 7:30 that he _________ home yesterday, so his parents were very worried.
#85004
A
until; not got
B
not until; got
C
until; didn’t get
D
didn’t until; got