1 . Mac was cycling along a road in Canada's Yukon, halfway through a 2,750-mile bike tour to Prudhoe Bay, Alaska. He was carrying a 30-pound camping bag, ___________ he wasn't moving very fast. Suddenly he heard loud breathing behind him. "Man, that's a big dog!" he thought. He looked to the side, but to his great___________, he saw that it wasn't a dog, but a wolf, running hard to___________ him.

Mac's heart jumped. He reached for the___________ from his bag. With one hand on the handle bar, he___________ the spray. A bright red cloud covered the wolf___________, and it fell back, shaking its head. But a minute later it was by his side again. He sprayed a second time, and the wolf fell back again, but only to quickly restart its___________.

The wolf was getting closer and closer, ___________ a dozen yards away. Mac waved and yelled at passing motorists, but meanwhile___________ hard. He knew clearly that he must be careful not to slow down. Otherwise, he would become a____________ of the wolf.

Paul and Becky were driving along the same road. From a distance, they spotted what they   ____________ was a dog running after a man on a bike. As they got____________, they realized it was a wolf.

Mac heard a car coming up behind him, and he slowed down. The car turned around the____________, then suddenly stopped in front of him. Mac____________ off his bike and dashed for the back door of the car. It was locked. Paul quickly unlocked the door so as to let Mac in, and the____________ man dived in, shutting the door behind him.

It was quite a while before Mac became calm and cried out: "I thought I was going to die!"And Paul and Becky were glad that they had given a helping hand to people in need.

2 . Concerns about the harm caused by “too much” screen time—particularly when it is spent on social media—are widespread. But working out what a “healthy” ___ might be is far from easy.

Some negative experiences on social media—like ____ how your appearance compares to others—do affect some children. However, this does not mean that technology use in ____ is harmful and it is difficult to make claims about how it will affect different people.

Consider the picture painted by a UNICEF review of existing research into the effects of digital technology on children’s ____ comfort, including happiness, mental health and social life. Rather than stating that social media was harmful, it suggested a more ____ effect.

The UNICEF report highlighted a 2017 study that examined 120,000 UK 15-year-olds. Among those teenagers who were the lightest users, it was found that increasing the time spent using technology was linked to ____ comfort—possibly because it was important for keeping up friendships. ____, among the heaviest users of technology, any increase in time was linked to lower levels of comfort. Overall, the UNICEF study suggested that some screen time could be good for children’s mental health.

A broader look at evidence provided by some other high quality studies again suggests the story is not ____. An early study in 2013 looked at how the television and video game habits of 11,000 UK five-year-olds affected them two years later. It is one of few studies actually ____ the effects of technology over time. It suggested that, compared with children who watched one hour of television or less on a weekday, a small increase in conduct problems was seen among those who watched more than three hours each day. Playing electronic games, however, was not seen as leading to a greater ____ of friendship or emotional problems.

So how much time should our children spend looking at screens? It is difficult to be ____ as different people spend time online in such different ways. A useful comparison might be with sugar. Broadly speaking, people ____ that too much sugar can be bad for your health. But the effect it might have can depend on many factors, from the type of sugar to the person and the amount. We would not ____ trust anyone who claims to predict how someone is affected by consuming one gram of sugar. The same could be said for ____ usage: the outcomes depend on so many factors that only very ___ predictions are possible.