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

解析試題分析：unless除非，whether是否，if如果，是否，until直到。it’s widely known that眾所周知。句意：眾所周知，除非你努力工作否則你不會(huì)取得成功。故選A。
考點(diǎn)：考查連詞的用法。