Task 1

16.Paragraph     ①     

17.Paragraph     ②          

18.Paragraph     ③      

19.Paragraph     ④           

20.Paragraph      ⑤      

A.Education

B.Land and Climate

C.State System

D.General Introduction

E.Economy

F.Population

When Holonyak invented LEDs, he believed that they would have a wide range of uses.

• A、True
  
  

• B、False
  
  

• C、Not Given
  
  

Edith Flanigen was also awarded Lemelson-MIT Prize for his work on LEDs.

• A、True
  
  

• B、False
  
  

• C、Not Given