We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.
A．sinceB．ifC．unlessD．until
C
該題考查考生對(duì)題干中兩個(gè)句子含義的理解以及對(duì)選項(xiàng)中連詞的掌握情況。由含義可知后句“那天下雨或寒冷”與前句“這周日去公園野餐”是條件與結(jié)果的關(guān)系，且為否定成立。
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