4.---How many students are there in your class,Rita?     

问题描述:

4.---How many students are there in your class,Rita?     
---The number was 45 last year.But this term it _____to 55.
A,increase B.increases C.increased D.has increased

选:D
译文:——Ruta,你们班上有多少学生?
——去年的人数是45,然而今年已经增长到了55
“增长”这个动作应经完成了,并对现在产生了影响,就应该用“已经”,即完成时态!