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

participle, for example 
doing
. Point out also that sometimes more than one verb 
form is possible but that the one used in the audioscript is the most logical. 
When you have checked the answers, point out that the phrases will be useful 
to students in the role play in Exercise 3c. Write the following categories on the 
board: Describing a problem
Asking for information
Asking for and suggesting solutions
Making decisions
Students work in pairs to decide which phrases go in which categories. There may 
be some disagreement.
 Suggested answers
Describing a problem: 1, 2, 4, 11, 12, 13
Asking for information: 3, 5
Asking for and suggesting solutions: 6, 7, 9, 10
Making decisions: 8, 14, 15, 16, 17.
As a follow-up, ask students to underline other phrases in the extracts in Exercise 
3a, and to decide which of the above categories each belongs to. Encourage 
students to use as many of the useful phrases as possible during the role play.