It's time for class. Don't knock outside the classroom. [ ]A. aboutB. down C. in
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It's time for class. Don't knock ____ outside the classroom.[ ]A. about
B. down
C. into
D. in
试题答案
A
It's time for class. Don't knock ____ outside the classroom.[ ]A. about
B. down
C. into
D. in
A