-How did you make so rapid progress in your English?Do you have any secrets?

-No. Only ________ hard working.[ ]

A．in terms of  

B．in honor of

C．by means of  

D．on behalf of

新建文档WD12C.DOC，复制文档WD12B.DOC的内容。将标题段的后间距设置为16磅。各段首字下沉2行，距正文为0厘米。正文各段的段后间距设置为6磅。存储为文档WD12C.DOC。