Ann and Bob have a large number of sweets which they agree to share according to the following rules. Ann will take one sweet, then Bob will take two sweets and then taking turns, each person takes one more sweet than what the other person just took. When the number of sweets remaining is less than the number that would be taken on that turn, the last person takes all that are left. To their amazement, when they finish, they each have the same number of sweets

They decide to do the sharing again, but this time, they first divide the sweets in two equal piles and then thay repeat the process above with each pile. Ann going first both times. They still finish with the same number of sweets each. 

What is the maximum number of sweets less than 1000 they could have started with ?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct wordfor each of the blanks.

Scientists say that (44) _______ the next thirty years we will not be able to tell the difference between the real people and the virtual people- that is, people created by computer. These virtual humans are already in films and computer games and engineers are setting up experiments to see if they can develop a (45) _______ feeling virtual people. And the prediction is that these virtual people will be better than us humans- because they are basically a machine, they can (46) _______ data and remember it much better than we can. In addition, they are starting to look much more like us. They are already used to (47) _______ research that may be dangerous for humans, such as on equipment for the army. The “virtuals” are very good at following procedures exactly so scientists can get reliable results. Engineers are carrying out further tests to find out how to get the virtual beings to understand conversation. Now, we can only “talk” to them by typing. But if you (48) _______ the internet, you will find more and more sites devoted to virtual humans- we are just at the beginning of what they can do.

Điền vào ô số 47

A. proceed

B. conduct 

C. convey 

D. lead

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct wordfor each of the blanks.

Scientists say that (44) _______ the next thirty years we will not be able to tell the difference between the real people and the virtual people- that is, people created by computer. These virtual humans are already in films and computer games and engineers are setting up experiments to see if they can develop a (45) _______ feeling virtual people. And the prediction is that these virtual people will be better than us humans- because they are basically a machine, they can (46) _______ data and remember it much better than we can. In addition, they are starting to look much more like us. They are already used to (47) _______ research that may be dangerous for humans, such as on equipment for the army. The “virtuals” are very good at following procedures exactly so scientists can get reliable results. Engineers are carrying out further tests to find out how to get the virtual beings to understand conversation. Now, we can only “talk” to them by typing. But if you (48) _______ the internet, you will find more and more sites devoted to virtual humans- we are just at the beginning of what they can do.

Điền vào ô số 44

A. within

B. for 

C. about 

D. during

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct wordfor each of the blanks.

Scientists say that (44) _______ the next thirty years we will not be able to tell the difference between the real people and the virtual people- that is, people created by computer. These virtual humans are already in films and computer games and engineers are setting up experiments to see if they can develop a (45) _______ feeling virtual people. And the prediction is that these virtual people will be better than us humans- because they are basically a machine, they can (46) _______ data and remember it much better than we can. In addition, they are starting to look much more like us. They are already used to (47) _______ research that may be dangerous for humans, such as on equipment for the army. The “virtuals” are very good at following procedures exactly so scientists can get reliable results. Engineers are carrying out further tests to find out how to get the virtual beings to understand conversation. Now, we can only “talk” to them by typing. But if you (48) _______ the internet, you will find more and more sites devoted to virtual humans- we are just at the beginning of what they can do.

Điền vào ô số 45

A. speculating

B. thoughtful 

C. thinking 

D. mindful

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct wordfor each of the blanks.

Scientists say that (44) _______ the next thirty years we will not be able to tell the difference between the real people and the virtual people- that is, people created by computer. These virtual humans are already in films and computer games and engineers are setting up experiments to see if they can develop a (45) _______ feeling virtual people. And the prediction is that these virtual people will be better than us humans- because they are basically a machine, they can (46) _______ data and remember it much better than we can. In addition, they are starting to look much more like us. They are already used to (47) _______ research that may be dangerous for humans, such as on equipment for the army. The “virtuals” are very good at following procedures exactly so scientists can get reliable results. Engineers are carrying out further tests to find out how to get the virtual beings to understand conversation. Now, we can only “talk” to them by typing. But if you (48) _______ the internet, you will find more and more sites devoted to virtual humans- we are just at the beginning of what they can do.

Điền vào ô số 46

A. gather

B. accumulate 

C. amass 

D. collect

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct wordfor each of the blanks.

Scientists say that (44) _______ the next thirty years we will not be able to tell the difference between the real people and the virtual people- that is, people created by computer. These virtual humans are already in films and computer games and engineers are setting up experiments to see if they can develop a (45) _______ feeling virtual people. And the prediction is that these virtual people will be better than us humans- because they are basically a machine, they can (46) _______ data and remember it much better than we can. In addition, they are starting to look much more like us. They are already used to (47) _______ research that may be dangerous for humans, such as on equipment for the army. The “virtuals” are very good at following procedures exactly so scientists can get reliable results. Engineers are carrying out further tests to find out how to get the virtual beings to understand conversation. Now, we can only “talk” to them by typing. But if you (48) _______ the internet, you will find more and more sites devoted to virtual humans- we are just at the beginning of what they can do.

Điền vào ô số 48

A. click

B. ride 

C. seek 

D. surf

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.

Mountaineers have noted that as they climb, for example, up to the 12,633–foot Humphreys Peak in the San Francisco Peaks in Arizona, plant life changes radically. Starting among the cacti of the Sonoran Desert, one climbs into a pine forest at 7,000 feet and a treeless alpine tundra at the summit. It may seem that plants at a given altitude are associated in what can be called “communities” – groupings of interacting species. The idea is that over time, plants that require particular climate and soil conditions come to live in the same places, and hence are frequently to be found together. Scientists who study the history of plant life are known as paleobotanists, or paleobots for short. They build up a picture of how groups of plants have responded to climate changes and how ecosystems develop. But are these associations, which are real in the present, permanent?

A great natural experiment took place on this planet between 25,000 and 10,000 years ago, when small changes in the earth’s orbit and axis of rotation caused great sheets of ice to spread from the poles. These glaciers covered much of North America and Europe to depths of up to two miles, and then, as the climate warmed, they retreated. During this retreat, they left behind newly uncovered land for living things to colonize, and as those living things moved in they laid down a record we can read now. As the ice retreated and plants started to grow near a lake, they would release pollen. Some would fall into the lake, sink to the bottom, and be incorporated into the sediment. By drilling into the lake bottom it is possible to read the record of successive plant life around the lake. The fossil record seems clear; there is little or no evidence that entire groups of plants moved north together. Things that lived together in the past don’t live together now, and things that live together now didn’t live together in the past. Each individual organism moved at its own pace. The fossil record seems to be telling us that we should be thinking about preserving species by giving them room to maneuver – to respond to environmental changes.

What is the second paragraph mainly about?

A. Plant migration after the ice age

B. The effects of the ice age on plants

C. The need to develop a new approach to environmental issues

D. Communities of plants live at different altitudes

Every weekend is important to the Garcia family. During the week they don’t have very much time together, but they spend a lot of time together on the weekend.

Mr. Garcia works at the post office during the week, but he doesn’t work there on the weekend. Mrs. Garcia works at the bank during the week, but she doesn’t work there on the weekend. Jennifer and Jonathan Garcia go to school during the week, but they don’t go to school on the weekend. And the Garcias’ dog, Max, stays home alone during the week, but he doesn’t stay home alone on the weekend.

On Saturday and Sunday the Garcias spend time together. On Saturday morning they clean house together. On Saturday afternoon they work in the garden together. And on Saturday evening they watch videos together. On Sunday morning they go to church together. On Sunday afternoon they have a big dinner together. And on Sunday evening they play their musical instruments together.

As you can see, every weekend is special to the Garcia. It’s their only time together as a family.

Mr. Garcia works at the _______.

A. post office   

B. bank

C. factory     

D. book store

Every weekend is important to the Garcia family. During the week they don’t have very much time together, but they spend a lot of time together on the weekend.

Mr. Garcia works at the post office during the week, but he doesn’t work there on the weekend. Mrs. Garcia works at the bank during the week, but she doesn’t work there on the weekend. Jennifer and Jonathan Garcia go to school during the week, but they don’t go to school on the weekend. And the Garcias’ dog, Max, stays home alone during the week, but he doesn’t stay home alone on the weekend.

On Saturday and Sunday the Garcias spend time together. On Saturday morning they clean house together. On Saturday afternoon they work in the garden together. And on Saturday evening they watch videos together. On Sunday morning they go to church together. On Sunday afternoon they have a big dinner together. And on Sunday evening they play their musical instruments together.

As you can see, every weekend is special to the Garcia. It’s their only time together as a family.

Mr. Garcia works at the _______.

A. post office

B. bank

C. factory

D. book store