1.谁知道怎样取的好成绩

1.谁知道怎样取的好成绩Who knows ______ ______ ______ ______?只有4个空,但我总觉得要5个空（how to get good grades）才够,求详解2.We are going to listen to a speech ______ what to do about our futureA.of B.in C.on D.with我总觉得要填about,求大神解释原题选择的原因和不用about的原因