28. Why does the author mention discussion forums and video conferencing tools?
(A) To criticize their overuse in classrooms
(B) To illustrate examples of technology that can support interaction
(C) To compare them with traditional teaching methods
(D) To show their disadvantages
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統計: A(0), B(10), C(0), D(1), E(0) #3853708
統計: A(0), B(10), C(0), D(1), E(0) #3853708