9. The Trung Sisters, who were military leaders more than 2,000 years ago, are considered national ______ of Viet Nam.
A. heroes: anh hùng
B. geniuses: thiên tài
C. youths: tuổi trẻ
D. scientists: nhà khoa học
Choose the word or phrase (A, B, C or D) that best completes each sentence.
Military is_______in this country. Every man who reaches the age of 18 has to serve in the army for two years.
A. compulsory
B. optional
C. illegal
D. unnecessary
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
One of (A) the students who are being (B) considered for the (C) scholarship are (D) from this university
A. One of
B. are being
C. for the
D. are
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 questions.
It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood.
The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them.
These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said.
Question: It can be inferred from the passage that research concerning the distress signals of trees______.Which of the following could be considered a cause of the distress signals of trees?
A. attacks by insects
B. experiments by scientists
C. torn roots
D. lack of water
Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
In my experience, freshmen today are different from those I knew 25 years ago.
A. first-year students
B. new students
C. new counselors
D. young professors
Exercise 3: Fill in the blanks
1. The Answer amount of rainfall in California is less than in Washington.
2. Houses along the Answer are sometimes destroyed in storms.
3. The weather Answer is changing. It's different from 100 years ago.
4. The snow in the mountains won't Answer if temperatures stay cold.
5. I want to relax today, but I'm going to work Answer.
6. Oranges Answer in warm, sunny places.
7. When temperatures Answer, people often go outdoors.
8. I'm Answer cold. Could you shut the window?
Exercise 3: Fill in the blanks
1. The Answer amount of rainfall in California is less than in Washington.
2. Houses along the Answer are sometimes destroyed in storms.
3. The weather Answer is changing. It's different from 100 years ago.
4. The snow in the mountains won't Answer if temperatures stay cold.
5. I want to relax today, but I'm going to work Answer.
6. Oranges Answer in warm, sunny places.
7. When temperatures Answer, people often go outdoors.
8. I'm Answer cold. Could you shut the window?
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 questions.
It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood.
The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them.
These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said.
Question: All the following are mentioned as possible factors in drawing insects to weakened trees EXCEPT______.
A. thermal changes
B. sounds
C. changes in color
D. smells
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 questions.
It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood.
The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them.
These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said.
Question: Which of the following is the main topic of the passage?
A. The effect of insects on trees.
B. The vibrations produced by insects.
C. The mission of the U.S Forest Service.
D. The sounds made by trees.
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 questions.
It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood.
The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them.
These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said.
Question: It can be inferred from the passage that research concerning the distress signals of trees______.
A. has been unproductive up to now
B. is no longer sponsored by the government
C. was conducted many years ago
D. is continuing
1. Jupiter and Saturn are the two largest Answerstarsplanets in our solar system.
2. In July 2015, a NASA spacecraft Answerexcitedreached Pluto for the first time.
3. Scientists believe there are more than 100 billion Answerlifestars in our galaxy.
4. The Answerdistancereach from Earth to the moon is only about 238,900 miles.
5. Earth only has a Answerplanetsingle moon, but Jupiter has almost seventy.
6. Earth is the only planet we know of that is Answersuitablenearest for human beings.
7. No one is sure if there is Answerlifediscovered in other parts of our solar system.
8. The Answernearestsuitable planets to Earth are Mars, Venus, and Mercury.
9. Astronomers were Answerexciteddistance when they saw pictures from the telescope.
10. In the future, scientists might Answersinglediscover other planets and alien worlds.
