Clearly development aid together with food the long-term solution to the problem of pove

问题补充：

Clearly, development aid together with food the long-term solution to the problem of poverty.

A. are

B. is

C. has

D. have

答案：

A. are

(答案→)B. is

C. has

D. have

解析：考查主谓一致。with连接两个主语，谓语动词根据前一个主语决定，故谓语动词用单数，根据句意用一般现在时，选B。