问题
选择题
You can’t believe how terrible the fire is __________ you see it with your own eyes.
A．though
B．because
C．unless
D．since
答案
答案：C
题目分析：句意：你不能相信火灾是多么的可怕除非_你亲眼看到它。Though虽然；because因为； unless 除非；since从。根据句意可知该选C。