Question

I am going to Tian’anmen Square to watch the raising of the national flag with Lin Tao ________ it rains early tomorrow morning.

A．if

B．unless

C．when

D．since

Answer 1

B

试题分析：句意：。我要与林涛去天安门广场观看升国旗，除非明天清晨下雨。If如果；unless除非；when当……的时候；since自从。所以选B。