—What should we pay more attention to if we go north in winter Mum?—Nothing much. Take w

问题补充：

—What should we pay more attention to if we go north in winter, Mum?

—Nothing much. Take warm clothes

the weather is cold.

A. as long as

B. now that

C. if

D. in case

答案：

A. as long as

B. now that

C. if

(答案→)D. in case

解析：本题主要考查连接词的意义及对句子间的意义、关系的理解。as long as 意思是“只要”，表示条件；now that 意思是“既然；由于”，表示原因；if意思是“如果”，表示条件；in care意思是“以防，万一；免得”，表示条件。根据句子间的意义及关系可知本题的正确答案选D。