Do you believe drinking a glass of wine every day reduce the danger of heart diseases?A.

问题补充：

Do you believe drinking a glass of wine every day reduce the danger of heart diseases?

A. could

B. must

C. need

D. should

答案：

(答案→)A. could

B. must

C. need

D. should

解析：考查情态动词：A. could可能B. must必要C. need需要D. should应该，句意：你相信每天喝一杯酒会减少心脏病的危险吗？选A。