Question

【题目】—Hey,you look worried. What’s up?

—I’m not sure__________

A. that can I pass the exam or not

B. If I can pass the exam or not

C. Whether I can pass the exam or not

Answer 1

【答案】C

【解析】句意：——嘿，你看起来担心。怎么啦？——我不确信我是否能通过考试。be not sure不确定，后面接宾语从句用疑问句，whether……or not“是否”，故选C。