Module 6 Unexplained Mysteries of theNatural World

跟踪导练（一）

阅读理解

One large dinosaur hid in the thick jungle （热带雨林）. With small， hungry eyes he watched a larger dinosaur， about 90 feet long！ It was eating grass by a lake.

The one in the jungle stood 20 feet tall on his powerful back legs. His two front legs were short， with sharp claws on the feet. His teeth were like long knives.

There was only one hope for the grass-eating dinosaur. Even though he was three times as large as his enemy， he was not a fighter. He could only try to get away， into deep water， where he could be safe.

The grass-eater tried to move fast. But the enemy was faster. His three-toed footprints show that he came closer and closer.

We can't be sure how the fight ended. We can only tell by the animals' footprints that the fight did take place. The mud where the two dinosaurs walked has turned into stone.

Footprints are not all that tell us about dinosaurs. Their bones and teeth have also been found. We even have some of their eggs in museums.

Scientists know how to fit a dinosaur's bones together. Then they can tell how the animal may have looked. From its teeth they know whether it ate meat or grass.

Dinosaurs were of many sizes and shapes. Some were as small as chickens. But all of them had very small brains.

Millions of years ago， dinosaurs ruled the earth. Since then， there have been no dinosaurs. What happened to them？

We know they did not all die at once. It may have taken a few million years for all of them to die.

In the days of the dinosaurs， the whole earth was warm and wet. There were many green jungles. But the earth changes slowly. When parts of the earth became cold and dry， the jungles were becoming less and less. Then dinosaurs could not find enough to eat. This must be one reason why the dinosaurs died out.

1. According to the text， the grass-eating dinosaurs .

A. had three-toed feet

B. were stronger than the meat-eaters

C. were three times as large as the meat-eaters

D. had two short front legs with sharp claws on the feet

2. What can be inferred about dinosaurs？

A. They had very big brains.   B. Grass-eating dinosaurs move faster.

C. Most of them were of the same size. D. Some of them tore their enemies with teeth.

3. How could people know the appearance of dinosaurs？

A. By examining the teeth.   B. Through a full-size picture.

C. Through the footprints.   D. By fitting the bones together scientifically.

4. The dinosaurs all died out probably because of .

A. the reduction ofjungles    B. the fights among the dinosaurs

C. the global warming    D. some diseases

阅读七选五

Attitude is a little thing that makes a big difference. If you can stay positive no matter what life throws at you， you've got the freedom to change your life into anything you want it to be. But how？

Enjoy the moment.

While the present moment may be uncomfortable， it is the only one that is guaranteed.1 Look beyond the present problem and find the moments that are worth enjoying and then enjoy each one.

Five happy things every day.

Make it a rule to recognize and then celebrate five happy things every day. Be sure to seek these happy things out and then hold them close so you can see their positive power.2

Embrace （接受） your mistakes.

3 Embrace your mistakes as an opportunity to learn something new about yourself and others. By becoming aware of your mistakes， you are able to move past them.

Hold yourself accountable.

It's up to you to walk your path. When you feel your positive attitude slipping away， hold yourself accountable for getting it back on track.4 It's going to take a positive attitude to make your dreams come true.

Let it go.

Holding on to old， negative thoughts will prevent positive thoughts from getting through.5 It's time to let go and begin living the life you are meant to live. It's time to stay positive—no matter what.

A. You would rather be happy.

B. Keep you safe from anxiety.

C. So let your negative beliefs go.

D. Thus， make the most of the present moment.

E. This habit helps you to appreciate whatever you have.

F. No one wants your goals and dreams more than you do.

G. Accept the fact that you are human and that nobody is perfect.

1.2.3.4.5.

跟踪导练（二）

完形填空

I came home from work one day and my son greeted me at the door with a wide smile.“Dad， I am a 1 man！” Puzzled （困惑的）， I asked my 2 about this. She shared with me that our five-year-old had emptied a 2-liter jug （壶） of water from the 3 most of it on the floor. My wife's first 4 had been to shout and beat him. However， she did not. She 5 asked him， “Breton， what were you trying to do？”

“I was trying to help you 6 the dishes， Mom，” he replied loudly. Sure enough， she 7 a pile of dishes that had been washed on the kitchen table.