The old scientist used to say that knowledge ______ from practice．

A．was comingB．comes

C．had comeD．would come

My iPhone isn’t in my bag．Where ____ I have put it?

A．canB．mustC．shouldD．would

— Can you explain your mistake?

— The fact is _______ I didn’t notice the warning．

A．thatB．howC．whyD．what

阅读下列短文,选出最佳选项。 Three-year-old Teddy Lasry was sleeping in his cowboy outfit (套装) yesterday at his family’s Fifth Ave．apartment when he shot up in bed screaming．A 3-foot-long black-and-white snake twisted around his left arm and had just bitten his little finger．

“The babysitter (a person taking care of children while their parents are away for a short time) was frightened to death,” said Teddy’s father, David Lasry, who, along with his wife, Evelyn, was at work when the snake appeared about 4:00 pm．

The horrified babysitter called 911 and the building’s doorman．The doorman and two cable TV workers helped take the snake off the boy’s arm and put it in a garbage bag．Police rushed Teddy to Mount Sinai Medical Center, where he spent two hours attached to a heart monitor as a precaution in case the snake was poisonous．It wasn’t．Experts at the snakebite treatment center at Jacobi Medical Center in the Bronx, where policemen took the snake, found out it was a non-poisonous California king snake．

But how did it end up in Teddy’s bed?

A little detective work determined that the snake had escaped two weeks ago from its cage in the apartment of a doctor whose family lives four floors below the Lasrys．The apologetic owner said his son’s pet snake likely traveled up the water pipes and into his neighbor’s apartment．“It’s a very gentle, very harmless snake,” he said．“It’s handled by our family all the time．”

David Lasry believed the pet was simply hungry after two weeks of wandering．Evelyn said her son seems to have overcome his fright by thinking of himself as a hero cowboy as he rode in the back of the police car to the hospital．

“I told Teddy he’s a pretty snake, a nice pet snake who got out of his cage,” Evelyn said．“But he asked, ‘Why did he bite my finger, Mamma?’ And I said, ‘Because he saw that you are a big boy, Teddy, in your cowboy outfit and he got scared．’”

1.What did the babysitter do after Teddy was bitten by a snake?

A．She ran out of the apartment．

B．She called the TV company．

C．She made an emergency call．

D．She took the snake off Teddy’s arm．

2.We can learn from the passage that the snake _______．

A．was poisonous

B．was kept in a cage by its owner

C．was deserted by its owner

D．escaped to the apartment

3.From the passage, we know _______．

A．Teddy needed a heart machine to stay alive for two hours

B．Teddy was awake when the snake arrived

C．Teddy’s mother was at home when the snake turned up

D．the snake was used to being touched

4.Teddy probably believed he was attacked because _______．

A．his parents weren’t at home

B．he was asleep the snake

C．was scared of him

D．the snake was hungry

The World Health Organization says there has been a sharp increase in the number of over-weight children in developing countries．In African countries, the WHO says the number of over-weight or obese children is twice as high as it was 20 years ago．Around the world, about 43 million children under the age of five were overweight in 2013．

Overweight and obese children are more likely to become overweight and obese adults．The condition can generate serious health problems like heart diseases．

Francesco Branca is the director of the WHO Department of Nutrition for Health and Development．He says urban lifestyle makes people eat processed food more often, which has a high sugar, fat and salt content．He also says people are gaining weight because of their lack of activities．They travel in cars or other vehicles more than on foot．

The WHO experts say to lower obesity rates is especially complex in countries that also deal with high rates of infectious diseases．

The WHO has some basic solutions for individuals and countries．The organization says you should lower your intake of fat, sugar, salt and processed food and eat more fruits, vegetables and increase physical activity．The WHO says these actions are especially important for children．

And WHO expert Branca says mothers should breastfeed their babies for at least the first six months of life, if possible．More importantly, governments should consider providing vitamins for children and educational campaigns about problems linked to obesity would also help．In his view, government policies should deal with how food is marketed to children and food producers must balance quality and taste with the dangers of sugar, fat and salt．"Reducing the number of overweight children will not be easy．The goal is difficult to meet even in wealthy countries．" he adds．

1.What is the main idea of Paragraph l?

A．Overweight children in developing countries have increased greatly．

B．Children in developing countries generally weigh too much．

C．The number of overweight children in the world has doubled．

D．The World Health Organization has increased greatly．

2.According to Branca, people are becoming overweight because of their changes in_______

A．school education

B．transportation

C．physical condition

D．lifestyles

3.The underlined word “generate” in Paragraph 2 probably means ______．

A．cure

B．cause

C．worsen

D．prevent

4.We can learn from the last paragraph that ______．

A．babies breastfed aren’t likely to become overweight

B．food producers should be stopped from marketing, food to children

C．governments should play a necessary role in fighting obesity

D．the number of overweight children decreases easily in wealthy countries

Many times, we find it very amusing to see people who can keep a smile on their face all the time．It’s kind of annoying, isn’t it? 1.___Let’s see some tips on how to have a positive attitude and see how that can change our lives．

2.__ It really works! If you’re stuck in a terrible situation or a negative stage of your life, all you have to do is to think of the good times that are going to come after your bad stage gets over．Hope for the best and you will get the best．

We always feel good when we help others in some way, right? There’ a sense of achievement, satisfaction and positivity associated with giving and helping．3.

Being grateful for what you have can help you to be positive．If you’re the type to be whining, complaining and groaning about the things you don’t have, we must say that you need a reality check．4. Look around you and see other people who don’t have enough resources like you do．

Forget the regrets of your past．Are you in a depressed mood all the time because you are carrying the burden of a trouble past with you? Then you must realize that every moment you think of a dark past with negativity, you will lose one bright moment of your present and the future．Letting go of your past is the only way you can have a positive attitude all the time．

5. Keeping fit and healthy is a critical tip in having a positive attitude．You might have all the money, success and the luxury in the world, but you won’t be able to enjoy anything if you don’t have good health．

A．So try to do a good deed a day and help others with your strengths．

B．Being unsatisfied will also be a barrier in helping you to have a positive attitude．

C．That’s because we don’t know the advantages of having a positive attitude all the time．

D．It’s no use complaining because you have already had a good life．

E．Think of the good times you are going to have．

F．Make sure you know the importance of good health．

G．Try to think about terrible and negative things in your life．

—I wonder if I could use your cellphone．

—_______．It is on the desk next to you．

A．No wayB．That's right

C．It’s a pleasureD．Be my guest

Nearly a century later，extensive observations_______that elephants indeed remember injuries and hold hates against their abusers．

A．confirmedB．have confirmed

C．will confirmD．had confirmed

______the morning train，he would not have been late for the meeting．

A．Did he catchB．Should he catch

C．Had he caughtD．Has he caught

I am sorry he has not told me his name on the phone because_______helps if I know who I am talking to．

A．itB．heC．oneD．its