The weather is not beautiful all of the time. Perhaps you can remember a day when bad weather made you afraid. One kind of bad weather that scares many people is called a thunderstorm. This is what happens when there is a thunderstorm. First, you see a sudden flash of bright light. A few seconds later you hear a loud rumbling sound. This quick flash is called lightning and the loud sound is called thunder. Lightning is colorful , but it can cause serious problems. Lightning is electricity that is moving very rapidly. It may be moving between a cloud and the ground, between two clouds, or between two parts of the same cloud. The lightning heats the air around it. This hot air expands, or get bigger, and it causes the air to move in waves. The air waves pass you in a series, one after another. For this reason, you may hear many rumbles and not just one sound.
____ 29/ Lightning may move between a cloud and the ground.
____ 30/ Thunder is a very bright light in a thunderstorm.
____ 31/ When you hear thunder you may hear a series of loud sounds and not one
big sound. This is because the air waves pass one after another.
____ 32/ Lightning always moves rapidly.
The weather is not beautiful all of the time. Perhaps you can remember a day when bad weather made you afraid. One kind of bad weather that scares many people is called a thunderstorm. This is what happens when there is a thunderstorm. First, you see a sudden flash of bright light. A few seconds later you hear a loud rumbling sound. This quick flash is called lightning and the loud sound is called thunder. Lightning is colorful , but it can cause serious problems. Lightning is electricity that is moving very rapidly. It may be moving between a cloud and the ground, between two clouds, or between two parts of the same cloud. The lightning heats the air around it. This hot air expands, or get bigger, and it causes the air to move in waves. The air waves pass you in a series, one after another. For this reason, you may hear many rumbles and not just one sound.
__T__ 29/ Lightning may move between a cloud and the ground.
__F__ 30/ Thunder is a very bright light in a thunderstorm.
__T__ 31/ When you hear thunder you may hear a series of loud sounds and not one
big sound. This is because the air waves pass one after another.
__T__ 32/ Lightning always moves rapidly.
Three signal lights were set to flash every certain specified time . The first light flashes every 12 second , the second flashes every 30 seconds and the third one every 66 seconds . The signal lights flash simultaneously at 8:30 a.m . At what time will the signal lights next flash together
12=3.2^2
30=3.2.5
66=11.2.3
BCNN(12,30,66)=3.2^2.11.5=660(sec)
660sec=11min
8:30min+11min=8:41min
=>The signal lights will flash together at 8:41
Mark the letter A, B, C, or D to show the underlined part that needs correction. 1. The children were frightening by the thunder and lightning. A B C D 2. Two people got hurt in the accident and were took to the hospital by an ambulance. A B C D 3. The students helped by the clear explanation that the teacher gave. A B C D 4. That alloy is composing by iron and tin. A B C D 5. The winner of the race hasn’t been announcing yet. A B C D 6. Progress is been made every day in all parts of the world. A B C D 7. When, where and by whom has the automobile invented? A B C D 8. Each assembly kit is accompany by detailed instruction. A B C D 9. Arthur was giving an award by the city for all of his efforts in crime prevention. A B C D 10. It was late and I was getting very worry about my son. A B C D 11. I discovered that many strange things were happened last night. A B C D 12. He was seen go to the beach with some other people. A B C D 13. He is believed to work for the CIA in the 1970s. A B C D 14. We are not let to cycle in the park, are we? A B C D 15. You should get your car to service every two years. A B C D 16. Only coffee and dessert been served at the reception yesterday. A B C D 17. When I have been finished my work, I’m going to take a walk. A B C D 18. When I crossed the road I saw two men whose car was broken down. A B C
Exercise 2.
1. The children were frightening by the thunder and lightning.
A B C D
2. Two people got hurt in the accident and were took to the hospital by an ambulance.
A B C D
3. The students helped by the clear explanation that the teacher gave.
A B C D
4. That alloy is composing by iron and tin.
A B C D
5. The winner of the race hasn’t been announcing yet.
A B C D
6. Progress is been made every day in all parts of the world.
A B C D
7. When, where and by whom has the automobile invented?
A B C D
8. Each assembly kit is accompany by detailed instruction.
A B C D
9. Arthur was giving an award by the city for all of his efforts in crime prevention.
A B C D
10. It was late and I was getting very worry about my son.
A B C D
1 B => frightened
2 C => were taken
3 A => were helped
4 B => composed
5 D => announced
6 A => is made
7 C => was
8 C => accompanied
9 A => wasgiven
10 C => very worried
* Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Although thunder and lightning are produced at the same time, light waves travel faster________, so we see the lightning before we hear the thunder.
A. do sound waves
B. than sound waves are
C. than sound waves do
D. sound waves
Chọn C Câu đề bài: “Mặc dù sấm và sét được tạo ra cùng một lúc, sóng ánh sáng đi xa hơn___________, vì vậy chúng ta thấy sét trước khi chúng ta nghe thấy sấm ".
Đáp án C: than sound waves do
—» Đây là cách nói rút gọn của “than sound waves travel”: cấu trúc so sánh hơn kém:
S + V + trạng từ ngắn đuôi er/dài thêm more + than + S + V.
Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.
Question 8: Although thunder and lightning are produced at the same time, light waves travel faster _____, so we see the lightening before we hear the thunder.
A. than sound waves do
B. than sound waves are
C. do sound waves
D. sound waves
Đáp án A
Giải thích: Khi so sánh, vế sau than phải dùng đúng cấu trúc như về trước (ví dụ He drives faster than I drive/ He is taller than I am), tuy nhiên có thể tránh lặp bằng cách thay động từ bằng trợ động từ tương ứng, to be thì giữ nguyên.
Dịch nghĩa: Mặc dù sấm và chớp được tạo ra cùng một lúc, nhưng sóng ánh sáng đi nhanh hơn sóng âm thanh nên ta nhìn thấy chớp trước khi nghe thấy sấm.
Although thunder and lightning are produced at the same time, light waves travel faster________, so we see the lightning before we hear the thunder
A. do sound waves
B. than sound waves are
C. than sound waves do
D. sound waves
Chọn C
Câu đề bài: “Mặc dù sấm và sét được tạo ra cùng một lúc, sóng ánh sáng đi xa hơn___________, vì vậy chúng ta thấy sét trước khi chúng ta nghe thấy sấm ".
Đáp án C: than sound waves do
—» Đây là cách nói rút gọn của “than sound waves travel”: cấu trúc so sánh hơn kém:
S + V + trạng từ ngắn đuôi er/dài thêm more + than + S + V.
Although thunder and lightning are produced at the same time, light waves travel faster________, so we see the lightning before we hear the thunder.
A. do sound waves
B. than sound waves are
C. than sound waves do
D. sound waves
ĐÁP ÁN C
Câu đề bài: “Mặc dù sấm và sét được tạo ra cùng một lúc, sóng ánh sáng đi xa hơn___________, vì vậy chúng ta thấy sét trước khi chúng ta nghe thấy sấm ".
Đáp án C: than sound waves do
—» Đây là cách nói rút gọn của “than sound waves travel”: cấu trúc so sánh hơn kém:
S + V + trạng từ ngắn đuôi er/dài thêm more + than + S + V.
Tom and Jelly embarked on a moving escalator to the second floor of a shopping mall. Tom walked up the escalator at a speed of 2 steps every second. At the same time, Jelly walked up the same escalator at a speed of 3 steps every 2 seconds. Tom arrived at the second floor in 25 seconds. It took Jelly 30 seconds to reach same floors. How many steps had the escalator when it stationary ?
