问题
__ more careful, the work might havebeen done better
A:Once
B:As long as
C:Unless
D:Since
B:As long as
C:Unless
D:Since
正确答案是：
同类题型
I’ll make dinner reservation(预定) for 6 and I’ll at 5 in my car.
ecial thanks to go thousands of volunteers,without ____tireless work, none of this would be possible
o there by taxi–It’s not far from here, I prefer ________
Excuse me, Maria. Can I use your bike —Sure. Here you are. But you must return it _____ time.