---What should we pay more attention to if we go out for a mountain camp.
---Nothing special. Take a special pair of glasses ______the wind there is strong and cold.A.now thatB.in caseC.providing thatD.so long as
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B解析now that意思为“既然；由于”；表示原因；in case意思为“以防；万一；免得”，表示条件；providing that 意思为“如果”，表示条件；so long as意思为“只要”，表示条件。根据句子间的意义及关系可知本题