Question

【题目】Working hard is not a __________ of great success, but it is among the essential requirements.

A. signB. signal

C. guaranteeD. mark

Answer 1

【答案】C

【解析】

考查名词。A. sign 标志，迹象；B. signal 信号；C. guarantee保证；D. mark符号。句意：努力工作不是取得巨大成功的保证，但它是必不可少的条件之一。故选C。