Tom as well as his classmates a song when the teacher came into the classroomA.a

Tom as well as his classmates __________ a song when the teacher came into the classroom

A.are singing

B.were singing

C.is singing

D.was singing

试题答案

D

考查主谓一致。as well as连接两个主语时，谓语动词取决于前者，句意：当老师进入教室的时候，不仅汤姆的同学而且汤姆当时正在唱歌。根据语境表示过去某一时刻进行的动作应用过去进行时态，所以选D。