Questions 1-10 Complete the table below. Write one word and / or a number

1 19 A (20 studies), 20 B (three factors),
21 A (doctors), 22 B (young children)
Questions 19–22
2 19 blood pressure 20 obesity crisis 
21 flu vaccine 22 aggressive behaviour
Task information: 5-option multiple-choice
1 1 A ii B iii C i
2 A ii B i C iii
2 Questions 23 and 24
D/E (in either order)
D: Paragraph F says, ‘We can also systematically 
measure [= record] our sleep by using personal tracking 
devices.’
E: Paragraph F says ‘Firstly, we could think about getting 
ready for sleep in the same way we prepare for the end 
of a workout – say, on a spin bike. “People use alarms to 
wake up,” Walker says. “So why don’t we have a bedtime 
alarm [= at a set time of day] to tell us we’ve got half an 
hour, that we should start cycling down? [= reducing 
activity].”’
Distraction 
A Although melatonin is a hormone that 
occurs naturally in the body, and is also sold by chemists 
to aid sleep, Walker does not specifically recommend 
buying and using it as a product; B The text says ‘While 
some researchers recommend banning digital devices 
[= bright screens] from the bedroom . . .’, but does not 
say if Walker agrees with this idea. We are only told that 
Walker believes that technology could in fact be useful 
in helping people to sleep better; C We are only told 
that companies [= employers] reward staff by giving 
them time off work if they can show they are sleeping 
properly. Walker doesn’t suggest that staff should ask to 
start work at a later time in the morning.
Questions 25 and 26
A/E (in any order)
A: Paragraph A says ‘Matthew Walker dreads [= feels 
anxious about] the question “What do you do?”’ This is 
because, once he tells people he is a sleep scientist, they 
expect him to talk about his research and give advice – 
when he would perhaps prefer to relax. 
E: Paragraph D tells us that Walker gives himself ‘a non-
negotiable eight-hour sleep opportunity [ = the chance 
to sleep] every night’ and that he keeps ‘very regular 
hours’. 
Distraction 
B Walker’s book is mentioned in paragraphs 
A and D, and the fact that he gives lectures is mentioned 
in paragraph B. However, we are not told that the book 
is based on the same information Walker presents when 
he gives lectures; C In paragraphs C and D, the effect 
of sleep deprivation on physical health is explained, 
but we are not given any information about Walker’s 
own physical state; D Walker has investigated the link 
www.ztcprep.com

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between dreams and the ability to deal with emotional 
experiences, but the text doesn’t say that he is 
interested in interpreting the meaning of dreams.