Question

Look! The boy is singing _____________ the classroom.

A. in front of            B. in the front of

C. at the left            D. on front of

Answer

B

【解析】

试题分析：句意：看！那个男孩正在教室前面唱歌。in front of在事物外面的前面；in the front of在事物内部的前面。结合句意，那个男孩应在教室里唱歌，故选B。

考点：考查介词短语的用法。