Jenny worked hard before the final examination, and it _______ ．She got an A．

A．showed off             B．paid off                  C．put off             D．took off

穿心莲的功效是（）

A.清热解毒，燥湿

B.清热解毒，明目

C.清热解毒，凉血

D.清热解毒，杀虫

E.清热解毒，养阴