Because so many visitors are visiting our school today, some teachers have to _

题型：不详难度：来源：

Because so many visitors are visiting our school today, some teachers have to _______ guides.

A．serve as

B．regard as

C．treat as

D．use as

答案

A

解析

词义辨析.   A. 担任;充当    B. 把……认着   C. 对待；把……看做 D. 把……当做……使用。句意：因为今天有如此多的参观者来我们学校参观，一些老师不得不充当向导。选A。