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
Please give me a call and let me know ________you will come back for dinner.
#56514
A
if
B
because
C
until
D
unless
---Did you also walk to Zhenguo Temple, Gaoyou from Yangzhou ?---Yes, it was a great trip ______ we didn’t enjoy it ______ the beginning because it rained .
#57911
A
and; in
B
or; at
C
so; at
D
but; at
