It was foolish of him to ____his notes during such an important test, and as a result,   he got punished.      [ ]

A. point to        

B. keep to              

C. stick to        

D. refer to  

推进“一带一路”建设，要加强（），开展多层次、多渠道沟通磋商，推动双边关系全面发展。

A、双边合作

B、多边合作

C、多种合作

D、跨境合作