单选题 There is a big difference between day-time and night-time temperatures on the island.
【正确答案】 A
【答案解析】本题的意思是“小岛上昼夜温差大。”第1段的倒数第2句说明岛上的昼夜温差很明显：extremely hot during the day but temperatures at night regularly fall well below freezing。说明白天酷热夜晚寒冷。