For questions 1-8, read the text below and decide which answer (А, В, C or D) best fits each gap. There is an example at the beginning (0).
|A cause||В bring||C lead||D make|
Teenagers really do need more sleep
The teenagers wore devices that recorded the movements they made, without being 3 of them, that indicated they were asleep. The results were then 4 to the number of illnesses that they had 5 from during the three weeks, in addition to the number of occasions on which they had been 6 from school.
What the study showed was that students who slept fewer than seven hours a night caught colds, flu and other relatively 7 illnesses more often. The problem is that as children enter their teens their natural sleeping patterns change, 8 in them going to sleep later and therefore wanting to wake up later – but they still have to get up in the morning to go to school.