问题

You won’t succeed_____harder

A:unless you will work
B:unless you work
C:unless you don’t work
D:if you won’t work

正确答案是：

同类题型

The river______ surface used to be covered with waste and rubbish is now taking on a new look.

He was so careless that he left _____the door ____. [ ]

I knocked at the door hard,and soon the door opened and a _____ face looked out, “ who is troubling me at this time of night.”

He tried to deal with the increasing burden of his work, but he finally________and had to take acomplete rest.[ ]

Not until he left his home __________ to know how importantthe family was for him