阿摩線上測驗
10. When the teacher walked into the classroom, there was such a din going on that he had to shout to get the attention of the students.
(A) discussion
(B) lecture
(C) loud noise
(D) bad smell
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統計： A(6), B(5), C(214), D(1), E(0) #2280695
統計： A(6), B(5), C(214), D(1), E(0) #2280695
