My English teacher gave me________ how to learn foreign languages. [ ]

A. advice on    

B. some advices on    

C. advices on    

D. an advice about

患者善悲喜哭，精神萎靡，疲乏少力，面色惨淡，胆怯易惊，心悸失眠，常被恶梦惊醒，滑精，阳痿，其临床意义是（）。

A.喜证

B.忧思证

C.惊证