For this unit Refers to Student’s Book pages Writing headlines

Students work individually to put the paragraphs in order and then check their 
answers in pairs.
 Answers
2  B    3  E    4  C    5  A
    d 
Discuss the question as a class. 
 Answers
Block: definition 1 
Post: definition 2
    e 
Students work individually to choose the correct definitions and then check their 
answers in pairs.
 Answers
2  b    3  a    4  a    5  b    6  a    7  b
Language note
Odd 
and 
occasional
 are interchangeable in certain contexts, although 
odd
 is less 
formal, for example 
I don’t go to the cinema very often, but I do watch the odd/
occasional film on DVD
 = I watch films on DVD occasionally / from time to time.
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Cambridge English for the Media   Cambridge University Press 2009