Question

【题目】We all believe you will succeed in working out the problem you give up.

A. if B. because

C. since D. unless

Answer 1

【答案】D

【解析】句意：我们都相信你会成功地解决这个问题，除非你放弃。A. if假如；B. because因为；C. since自从；D. unless除非。通过翻译即可排除A，B，C所以正确答案应是unless，故答案选D。