(2013·山东，32)—This is a really lively party.There's a great atmosphere，isn't there?

—________.The hosts know how to host a party.

A．Don't worry

B．Yes，indeed

C．No，there isn't

D．It all depends

In         review of 44 studies, American researchers found that men and women     who        

ate six key foods daily cut the risk of ______ heart disease by 76%.

A．a; the

B．the; a

C．a; 不填

D．不填； a