The most important thing when an emergency is to stay calm.A. keep it in mind; deal withB

问题补充：

The most important thing when an emergency is to stay calm.

A. keep it in mind; deal with

B. keep in mind; dealing with

C. to keep it in mind; dealing with;

D. to keep in mind; dealing with

答案：

A. keep it in mind; deal with

B. keep in mind; dealing with

C. to keep it in mind; dealing with;

(答案→)D. to keep in mind; dealing with

解析：本题考查非谓语动词。第一空用不定式作定语，本句逻辑主语为you，与deal with的关系为主动关系。句意：当遇到紧急情况的时, 最重要是要保持冷静。选D。