--Mike,ismathdifficulttolearninhighschool?  --Sure!But...

问题详情：

 --Mike, is math difficult to learn in high school?

   --Sure! But I have made great progress ______ the help of my teacher

   A, through       B. by            C. with         D. without

【回答】

C        

知识点：介词和介词短语

题型：选择题