The city park will be cleaner ___________ people stop dropping litter here and there.
#56719
A
while
B
if
C
unless
D
before
推荐题目
You won’t feel happy at school ____ you get on well with your classmates.
#57679
A
though
B
when
C
unless
D
because
Tony is an English boy. He can speak English, ______ he can’t speak Chinese.
#56312
A
and
B
but
C
too
D
so
—Jeff, your bike looks beautiful __________it is a little old.—Thank you. I got it on my tenth birthday.
#55153
A
but.
B
though.
C
as soon as.
D
because.
--Hurry up! The bus is coming.--Wait a minute. Don’t cross the street the traffic lights are green.
#56768
A
until
B
after
C
while
D
since