Question

【题目】You are sure to fail the exam__________you study hard.

A.if B. unless C. since D.that

Answer 1

【答案】B

【解析】

试题分析：句意：如果你不努力学习，你一定会考试不及格的。A.if如果；B. unless如果不；C. since自从；结合句意，故选B。