In the street I met the professor_______gave us a talk last week.
#57736
A
what
B
which
C
／
D
who
推荐题目
The city park will be cleaner ___________ people stop dropping litter here and there.
#56719
A
while
B
if
C
unless
D
before
---Finish your homework __________ you can’t play computer games, Jim.---All right, Mum.
#56427
A
but
B
till
C
and
D
or
-- does your sister practice singing English songs? ----Twice a week.
#56345
A
How soon
B
How long
C
How far
D
How often