Helen is my good classmate. She needs to buy a new sweater, and she ________ to Mrs. Cool’s Clothes Store. The clothes are at good ________. Helen tries on (试穿) ________ orange sweater first. Orange is her favorite color, but this one is too small for her. Then she tries on a blue one.

“This blue sweater ________ beautiful on you, little girl. ________ about buying this one? And it is on sale. It is only 62 dollars,” Mrs. Cool says.

Helen thinks the sweater is beautiful, ________ she takes it. She gives Mrs. Cool 100 dollars. Then she gets the change (零钱) ________ Mrs. Cool and goes home.

When Helen gets home, she ________ she gets 48 dollars. “Oh, no,” Helen says. She goes back to Mrs. Cool’s Clothes Store and gives ten dollars to ________.

“You are a ________ girl,” Mrs. Cool says.

Alan was a skinny old man who lived all alone. One day he got _______ bad cold and he called for a doctor.

While the doctor _______ Alan, he asked, “Don’t you have a friend _______ could come and take care of you?”

“No, I’ve never had _______ friends,” the old man said.

“You’ve lived here all your life and never had a friend?” the doctor said _______ surprise.

“I’m 64 years old, but I’ve never met anyone I _______ call a friend,” Alan said. “If it isn’t one thing wrong with them, it’s another.”

“Our village head, Robin, will surely help you if he _______ you are sick,” the doctor said.

“It’s so _______ to listen to Robin,” Alan added. “You’d imagine there was nothing in this world _______ his crops and his wonderful, healthy pigs.”

“Then what about Max, who lives down the road?”

“A selfish man, __________ he’s smart and interesting to talk to,” Alan continued. “He visited me a lot before. But he’d come only when he felt like __________ so. I don’t call that neighborly.”

“You can’t bring up anything against Toby. Everyone loves him,” the doctor laughed.

“Right,” agreed Alan. “If I let Toby __________ on my doorstep, he would do so. But he’s __________noisy for me to stand him for more than five minutes.”

“I’m afraid you see too much of your neighbors’ __________ and you’re blind to what good people they actually are,” the doctor said. “You’re a hard nut to crack, old man! Anyway, please call me if you need me.” The doctor left and not a word of “thank you” __________.

【推荐1】Take a piece of hair from your head. Ouch! It may be long, _____ it’s not very wide. Three scientists spent over 30 years _____ machines that are about a thousand times _____ than the width of one piece of your hair. They are _____ small that they can only be seen under _____ microscope (显微镜)!

They _____ nanomachines (纳米机器). Because of their hard work, the three scientists won the 2016 Nobel Prize in Chemistry. They are all European,

Sir J. Fraser Stoddart, one of the scientists, told reporters that he thanked _____ other scientists from 24 different countries for helping make this prize _____. He said he once brought home a chocolate Nobel Prize _____ his daughter from a trip to Stockholm. He was very excited ______ a real one.

Scientists believe that in the future, nanomachines could ______ deliver medicine inside a person’s body, or take away things ______ are making us sick.

Mr. Feringa compared their work to that of the Wright Brothers. When the Wright Brothers ______ their airplane for the first time, some people questioned ______ airplanes were good for. Now we use ______ all the time.

【推荐2】In the early 1990s, the word “Internet” was strange to most people. But today, Internet has become a _______ tool for people all over the world. Maybe Internet has been the greatest _______ in the field of communication _______ the history of mankind (人类). Communicating with others on the Internet is much _______. We can chat with a person who is _______ in the other part of the world. We can email our friends and they can read _______ emails within a minute.

Giving all kinds of information is probably the _______ advantage of the Internet. We can use search engines _______ the information we need. Just type in a keyword or keywords and the search engine will give _______ a list of suitable websites to look at.

We can enjoy a lot on the Internet by downloading games, __________ chat rooms or surfing websites. There are some games for free. We can __________ new and interesting people in the chat room. We can __________ listen to music and see films.

Now, there is a lot of service on the Internet such as online banking, job finding __________ ticket buying. We can also do shopping and find __________ all kinds of goods. Sometimes we can find something that is quite good but very __________.