Many a company______every effort to keep in contact with its customers.

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问题 Many a company______every effort to keep in contact with its customers.

选项 A、are making
B、are made
C、is made
D、is making

答案D

解析 这句话的意思是说,许多公司正在想办法与顾客保持联系。“many a+名词”虽然表示复数概念,但谓语依然要用单数形式。
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