题目内容

An INTERESTING experiment

It takes a little skill to do this experiment, but the result is truly SURPRISING.

What do you need?

? Several rubber balloons

? Wooden skewer（木签）

? Vegetable oil

? Paper towel

Step l

Blow up a balloon, let some of the air out of it, and tie it closed.

Step 2

Rub some oil on skewer with paper towel.

Step 3

Gentle twist（搓捻）and push skewer into end of balloon opposite the knot. If balloon pops（爆 炸），go back to Step 1.

Step 4

When skewer is in balloon, slowly twist and push it out of balloon near knot.

What will happen?

____▲______

The balloon does not pop, even though it has a skewer in it.

Why won’t it pop?

? Rubber is made out of long chains of molecules （分子）.

? The skewer pushes these molecules aside.

? The molecules mix with the oil and they stick together tightly.

? The oil on the skewer seals the hole and air cannot get out.

1.Which is the most suitable word for “ ▲ ”?

A.Topic B.Result C.Step 5 D.Reason

2.What can we infer（推断）from the passage?

A.It’s easy to push a skewer into and out of a balloon when doing the experiment.

B.You’d better blow as much air as possible into a balloon to make it big enough.

C.There’s no need for you to use the oil and paper towel while doing the experiment.

D.It’s hard for the air to get out of the hole as molecules and oil stick together.

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You have probably heard of tomato throwing and the polar bear swim,but have you ever heard of the sport of cheese rolling?

Cheese rolling is an event that takes place every spring at Cooper's Hill,Gloucestershire(a county in England,west of London). People say that cheese rolling is one of Great Britain's oldest customs. Some say the custom started even before the Romans lived in that country 2000 years ago.Most say cheese rolling has been going on for at least a couple of centuries as a celebration of the onset (beginning)of summer.

Each year, thousands of spectators come to Cooper's Hill to watch people chase ( run after) a three kilogram round of Double Gloucester Cheese down the hillside. There are separate races for men and women, and uphill races for boys and girls too. The winners get to keep the rounds of cheese they have tried so hard to catch. However, no one ever catches the cheese because it runs fast down the slope(斜坡)at nearly 110 kilometers per hour !

It is funny to imagine people chasing a little wheel of cheese as it rolls down a hill, but maybe it is not so funny to see it because Cooper's Hill is very Steep(陡峭的).Every year, several of the cheese chasers tumble down the hill. Often, people have their bones broken, but this has not stopped the event from taking place.

Would you chase cheese down a hill?

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A.The place where the event is held.

B.The time when the event is held.

C.The history the event already has.

D.The reason why the event is held.

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A.People who report the event.

B.People who work for the event.

C.People who take part in the event.

D.People. who are watching the event.

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A.Sex and Height. B.Age and weight.

C.Sex and age. D.Height and Weight.

4.What does the writer think of the cheese rolling event?

A.It's funny. B.It's tiring.

C.It's dangerous. D.It's crowded.

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A.mistakes B.decisions C.progress D.trouble

—Can I have some milk?

—Sorry, there is none _____________. What about some juice?

In Western culture, “Black ____________(星期五)”, sometimes represents an unlucky day.

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--He wanted to know ___________.

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C.how long would the meeting last D.who is the host of the meeting

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A.the; a B.an; / C./; a D.an; the

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4.A.rare B.strange C.necessary D.common

5.A.After all B.What's worse C.For example D.That's to say

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8.A.among B.between C.without D.below

9.A.how B.when C.why D.where

10.A.doubted B.wondered C.believed D.supported

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