题目内容
The students ________ busily when Miss Brown went to get a book that she ________ in the office.
[ ]
A．had written, left
B．were writing, has left
C．had written, had left
D．were writing, had left
答案：D
练习册系列答案
相关题目
题目内容
The students ________ busily when Miss Brown went to get a book that she ________ in the office.
[ ]
A．had written, left
B．were writing, has left
C．had written, had left
D．were writing, had left