The UN system is a major purchaser of go...

The UN system is a major purchaser of goods and services ,_______over $4 billion a year .

A．to total

B．totaling

C．totaled

D．total

B 【解析】这题考查total做动词表示“总数是”的用法，这里用现在分词做状语，句意是：联合国体系是商品和服务的主要购买力，一年总数超过40亿。选B。

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