Why not______ your teacher for help when you can’t finish ______ it by yourself?[ ]

A. ask; write      

B. to ask; writing  

C. ask; writing    

D. asking; write

插页广告也叫做（ ）。

A．赞助式广告

B．竞赛和促销广告

C．电子杂志广告

D．弹出式广告