They became good friends during the war, and since then their lifelong friendship has______ tests of life

and death.[ ]

A. gone through

B. got through    

C. stood up

D. cleared up

下列（）说法为减少贸易壁垒提供了最好的辩护理由。

A．军事自足说

B．稳定性多样化说

C．扶植新兴产业说

D．提高全球总产出