Question

【题目】I don't know if I anyone at the party this evening. If I anyone, I will get nervous.
A.will know, won't know
B.will know, don't know
C.know, won't know
D.know, don't know

Answer 1

【答案】B
【解析】句意“我想知道我是否认识参加今晚晚会的人。如果我一个也不认识，我将会紧张。”If作“是否”讲，引导宾语从句，时态不受限制；作“如果”讲，引导条件状语从句，从句用一般现在时代替将来时。所以答案是B。