Are ____________ clean?[ ] A. thewindows
问题:
Are ____________ clean?[ ]
A. the windows of the classroom
B. the window of the classroom
C. the classrooms windows'
D. the window of the classrooms
Are ____________ clean?[ ]
A. the windows of the classroom
B. the window of the classroom
C. the classrooms windows'
D. the window of the classrooms