四六级考试

试题来源：大学四级-392
【单选题】 Sometimes online distance learning can be a problem because ______.
A．it is not as interesting as face-to-face learning
B．the learners only have the written text
C．some students don't know how to organize their time
D．some learners don't need face-to-face cues

参考答案：B
网考网解析：
答案可以从文章第二段第三、四、五句中推出。... 查看试题解析出处>>