John and Mary had two lovely children. Once they were asked to go on a business trip. So they found a babysitter(临时保姆) to take care ________ the children.

A week later, as they drove into their hometown, they noticed smoke and went to see ________. A house was on fire! Mary said, “Well, the house isn’t ________. Let’s go.”

But John kept driving close, “The house belongs to Fred.” “It has nothing to do with us, let’s go.” said Mary. But John drove up. A woman ________ in the street, “My children! Help! Help!” John asked her ________ him where her children were. “In the bathroom,” cried the woman.

But Mary didn’t agree, John hurried for the bathroom ________ was full of smoke and heat. He soon found two children. As he left, he could hear some other sound like crying. He quickly sent the two children to a safe place. But he ________ two more children were still inside. Mary shouted, “Don’t go back! That house ________ down in any second!”

John went back by feeling his way down into the room. It seemed a century had passed before he found both the children ________ the return way. As he walked up the endless steps, the thought went through his mind that there was ________ strangely familiar about the little bodies, and at last when they came out, he found that he had just saved his own children!

The babysitter had left them in this house while she did some shopping.

If you have one easy task to do and one hard task as well, which one will you do first? What are your reasons for this? There was once a man _______ built his own house. From top _______ bottom, he designed and built every inch（英寸）of his home. It _______ him over a year. But in the end, he had _______ beautiful house of his own. No other house in his neighborhood looked like it and many of his neighbors admired it.

But as time went by, his house started to have some problems. One day, a neighbor said, “Friend, it looks like _______ front yard is a bit overgrown.”

The man replied, “Yes, I know. But it’s okay. I’ll cut the grass tomorrow.”

A few days later, a mailman came by with a letter for the man. The mailman said, “Friend, it looks like your windows are a bit dirty.”

The man replied, “Yes, I know. But it’s okay. I’ll wash them tomorrow.”

Weeks passed by. Finally, the man’s brother came over _______ a visit. He took one look at his brother’s house and _______ believe what he saw. The yard was a mess, the paint on the walls was falling down and the windows _______ with dirt（尘土）. The house looked like it could fall apart at any second—all because the man put everything off _______ “tomorrow”.

When we procrastinate（拖延）, “tomorrow” can turn into “next week” or even “next year”. It’s much ________ to just take care of things today than to wait until some imaginary “tomorrow” that might not actually come.

Nobody likes a bully, but bullying is a big problem around the world. According to the US National Bullying Prevention Center, one out of every five ________ in the US have been bullied. Nathan Fellars is ________ eighth grader at Centennial Middle School in Utah, the US. When he saw classmates being bullied, he ________ he had to do something. “People often deal with bullying after the bullying has happened. I wanted ________ if there was a way to reduce bullying before it happened at all,” Fellars told the Society for Science. After studying more about the causes of bullying, ________ had an idea to make the app Bully Block. On the app, students can share their lives, whether good ________ bad. Others can post their responses. But before the responses ________, an AI program reads all of them. Only positive words will be shown. Fellars believes ________ this will naturally stop bullying both online and in schools. ________ useful app it is!

“I would love to see my project be used ________ teachers and students,” said Fellars. “I love knowing that my invention can help somebody else in the world.”