Question

It’s widely known that you won’t achieve success _____ you work hard.

A．unless

B．whether

C．if

D．until

Answer 1

A

试题分析：unless除非，whether是否，if如果，是否，until直到。it’s widely known that众所周知。句意：众所周知，除非你努力工作否则你不会取得成功。故选A。