题目内容：

阅读下面短文,把A—D四个句子填入文中空缺处,使短文内容完整、正确,然后完成第47小题。

Do you know what a MOOC is?MOOC is short for Massive(大量的)Open Online Course.Thousands of people can take a MOOC at the same time.You can be anywhere in the world to take it. 43

For years,many colleges have had classes online.MOOCs are always used in subjects like computer science and engineering.Can MOOCs be used in subjects like arts or philosophy(哲学)?

Scott Anderson teaches philosophy at a university in Canada. 44 He says,“When students take some lessons,they needn't be present to hear and get them.”He says more and more students in MOOCs can mean less communication between them and the teachers.He also gives two ways to solve this problem—adding more teachers and making online discussion groups.

45 She says online education has more weaknesses for her subjects.She says,“What's lost in online education is face-to-face communication.But the teaching of literature needs that.” 46 However,she believes that hybrid(混合的)courses work best.

A.He thinks MOOCs have both advantages and disadvantages.

B.All you need is a computer and the Internet.

C.Lisa Jadwin teaches literature and writing at a college in New York.

D.She says some students can learn very well from talks and discussion groups.

1._____

2._____

3._____

4._____

5.The passage is mainly about   .

A. how students take MOOCs

B. what two teachers think of MOOCs

C. which college has MOOCs

D. why more and more teachers like MOOCs