Her pen pal not only helps her      English     gives her     how to learn math well.

A．with; but also; some advices on

B．learn; but; some advice on

C．to learn; but also; some suggestion about

D．learning; but; some suggestions on

肾气不固患者，可因____失固而带下清稀量多，因____失约而尿后余沥不尽。