(单选题)

What is the benefit of this two-way interaction?

A.It can smile back.

B.It can use microphone.

C.It can talk any topic.

D.It can change if necessary.

参考答案：D

参考解析：

细节理解题。根据文章第二段最后一句“This two-way interaction not only helps attract the students’ attention, but also allows the program’s developers to monitor their engagement, and make changes if needed”可知“这种双向互动不仅可以吸引学生的注意力，还能在需要时进行更改”。故选D。

知识点：

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