问题描述：
-why were you back to school last night?-because i ___my English book in the classroom.
-why were you back to school last night?
-because i ___my English book in the classroom.
A.have forgotten
B.have left
C.had forgotten
D.had left
求详解
-why were you back to school last night?
-because i ___my English book in the classroom.
A.have forgotten
B.have left
C.had forgotten
D.had left
求详解
问题解答：
我来补答展开全文阅读