B. New technologies often turn products and services into goods of high quality.

　　C. If you refuse to change, you will lose in most fields.

　　D. People who taught an online course gave us the exact data of the survey.

　　【解析】选A。推理判断题。根据第二段Their biggest concern: limited interaction between teachers and students. 得知被调查者担心这种网络公开课程会导致师生之间的互动不够。

　　4. What is the author’s attitude towards the result of the survey?

　　A. Doubtful.

　　B. Optimistic.

　　C. Worried.

　　D. Proud.

　　【解析】选A。观点态度题。根据文章末段作者提出的对参与对象的质疑, 以及重复提出一些人对网络开放课程的支持可知, 作者对调查结果持怀疑态度。

　　B

　　I received a call today asking if I would be willing to bring food to a family in need. The mother was having a major operation and would be lying down for several weeks. Of course, I responded with an immediate“Yes! ”. As I planned the meal in my head, I reflected on how many times over the years I had been asked to prepare food. I have done so countless times with a very open heart.

　　But the truly amazing thing is that I have received double over the course of my life. When my mother passed away, our house was filled with fresh dinners for weeks. A woman from the church of our community stepped by each evening with some food. The gift of food was her small way of trying to ease our pain.

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