The teachers never arrive late for work from Monday to Friday.A. on weekendsB. on weekdays

问题补充：

The teachers never arrive late for work from Monday to Friday.

A. on weekends

B. on weekdays

C. every day

D. five times a week

答案：

A. on weekends

(答案→)B. on weekdays

C. every day

D. five times a week

解析：on weekends在周末；on weekdays在工作日；every day每天；five times a week一周五次。句意：从周一到周五，老师们从来没有上班迟到。结合语境可知选B。