问题
选择题
---Did you go to school yesterday?
--- Yes, I did. But I was late. When I got to school, Mr. Zhang __________his lessons.
A．has already begun
B．had already begun
C．has begun yet
D．had begun yet
答案
答案：B
根据句子表达意思，发生的时态为过去的过去，要用过去完成时，故选答案为B