在职研究生英语（一）
阅读短文，选出填入空格最合适的一项： Wild bees receive no …
第 1 题单选题模拟题较易
阅读短文，选出填入空格最合适的一项：
Wild bees receive no wages, yet their work is worth a great deal to farmers. Because pollination is never bought or sold, its value is ___ in official economic statistics, and the decline of wild bees rarely appears as a loss in any national account.
完形填空首句定调解题步骤