We’ll have a picnic in the park this Sunday it rains or it’s very cold. A.since

We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.

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

试题答案

C

句意为：我们这个星期天要去公园野餐，除非下雨或天气非常冷。unless除非。