You’re at your new school. It’s lunch time, but you don’t have anyone to sit with.

You want to _________ someone at their table, but you’re not sure if they’re friendly. What do you do? Natalie’s way to _________ the problem was to create an app. She knows what it feels like to be alone at a new school. She found it difficult to make new friends and had to _________ a new table at lunch every day. If she sat by herself she felt _________. But if she asked to join someone and was _________, she felt embarrassed. She created a lunch planning app to help students like _________ find people to have lunch with.

The app—called Sit With Us—is _________. If a student is having lunch in the afternoon, he or she can create an invitation. Other students can open the app and _________ that invitation. They can then use the app to decide when and where to _________. This allows students to make __________ online instead of face to face. This is the reason why it works so __________ it lowers the risk of being refused, and the embarrassment that goes along with it.

Natalie is happy to see that people are __________ to her app actively especially those who suffer from bullying (迎受欺凌). Soon after she made her app __________ to the public, she won a prize for it. She also appeared in many news stories.

Natalie was even asked to __________ at a university. In her talk Natalie wanted people to know that you don’t have to do something big to change __________. Sometimes, a simple thing—like having a friend to enjoy lunch with—can make all the difference.

We can use robots in many different places now, but robots don’t have a ________ history. We usually see robots in the films. The robots in these films are ________, faster and cleverer than people. In real life, people ________ robots in factories most of the time. Robots can do many dangerous, difficult or boring jobs for ________. Some people can’t look after themselves but robots can help them in everyday ________. For example, some blind people use dogs to help themselves ________ around. These dogs are guide dogs. And now scientists are making a robot to ________ these people. In the future, robot dogs may take the place of these guide dogs. And these robot dogs can help blind people to do many other useful things.

People also use robots in some American ________. At one hospital, a robot takes meals from the kitchen to sick people’s rooms. It never ________ its way because it has a map of the hospital in its computer system (系统). In the future, robots will work in many different ways. But robots will ________ take the place of human (人类).

Richard has always enjoyed making things using old household appliances and machines. _______ when he was quite young, he made fans for his parents’ house from car parts and things he found in a junkyard.

Richard lives on the edge of the Nairobi National Park in Kenya. The park is full of rhinos, giraffes, buffalos and lions.

Since he was nine, Richard has had the job of looking after his family’s cows, goats and sheep. The big _______ has been the lions. “I grew up hating lions” says Richard. “They used to come at night and feed on our cattle when we were sleeping.”

Then one night, as he was walking around with a torch, he noticed something. “I discovered that the lions were _______ of the moving light.” Lions are naturally afraid of people. Richard realized that the lions connected the moving torchlight with people, so they _______. Using some bulbs and wires, Richard set up a series of flashing lights to give the _______ that people were walking around the land where the animals were kept. The lions didn’t come near. Soon other families were using his “lion lights”.

Richard’s lion lights cost just ten dollars to make. They have not only helped the farmers but also the lions. Many lions have been killed by farmers trying to protect their animals. Now, across Kenya, Richard’s idea has been _______ by farmers to protect their animals from predators (捕食性动物) and to protect their crops from elephants.

Richard has been offered a scholarship at one of Kenya’s top schools. “One year ago, I was just a boy herding my father’s cows. Now I want to be an engineer and a pilot.”