2019年12月英语四级真题及答案完整版（卷一/卷二/卷三）四级翻译写作范文听力阅读原文（8）

2019年12月英语四级真题及答案（卷三）：仔细阅读

46-50:教材的命运

46、C)They cant connect professors and students as textbooks do

47、D) Falling sales

48、A) Reform its structures

49、C)Answer questions using their personal experience

50、B)They can learn in an interactive way

51-55:新型物种

51、D)It gets energy from both food and sunlight

52、A）The genes it captures from the sea plant algae

53、D)They can produce chlorophyll on their own

54、C)They don't usually function inside animal cells

55、B)They can survive for months without eating