单选题 You will be late ______ you leave immediately.
【正确答案】 A
【答案解析】本题考查连词辨析。可转化为If you don"t leave immediately, you will be late。B、D句意不对，且or表转折，A意为“除非”。句意为：除非你立即走，否则你就会迟到。