问题

Couldit be in the classroom_____ we had a talk last night _____you left yourkeys
A:Willyou help me with it
B:Let'shelp each other
C:I'lltry my best to learn it well
D:where; in which
B:Let'shelp each other
C:I'lltry my best to learn it well
D:where; in which
正确答案是: