根据所给汉语意思完成句子，使句子完整正确。

1. Jack has made great__________（进步）on his physics learning.  

2. The lady refused the man's help__________(有礼貌地）. 

3. Could you_________（拾起）the pen up for me?  

4. The sign means "You can't_________ （吸烟）here.”  

5. The little girl is afraid of_________（老鼠）.

老年期最常见的功能性精神障碍为()

A．老年疑病症

B．离退休综合征

C．老年抑郁症

D．老年焦虑症

E．老年痴呆症