Question

【题目】Jerry will succeed in working out the problem ____he gives up.

A. ifB. becauseC. soD. unless

Answer 1

【答案】D

【解析】

句意：杰里将会成功地算出这个问题，除非他放弃。考查连词辨析。A.如果；B.因为；C.因此；D.除非。据题意可知，是除非他放弃，“除非”unless，引导条件状语从句。故答案为D。