Dạng 1: Tập hợp

 Bài 1:  a/ Viết tập hợp A các số tự nhiên lớn hơn 9 và nhỏ hơn 18 theo hai cách.

  b/ Điền các ký hiệu thích hợp vào chỗ trống: 

                9 …. A    ;   17 ….  A;

Bài 2: Bằng cách liệt kê các phần tử, Hãy viết các tập hợp sau:

a)     Tập hợp M các số tự nhiên nhỏ hơn 9.

b)    Tập hợp C các số tự nhiên không vượt quá 7.

c)     Tập hợp D các số tự nhiên lớn hơn 13 nhỏ hơn 21.

d)    Tập hợp K các số tự nhiên lớn hơn 25 và không vượt quá 30

Bài 3: Tập hợp A các số tự nhiên lớn hơn 15 nhỏ hơn 20. Hãy mô tả tập A bằng hai cách.

Bài 4. Cho tập hợp M = {n |  n là số tự nhiên nhỏ hơn 20 và n chia hết cho 5}. Viết tập hợp M bằng cách liệt kê các phần tử của nó.

Bài 5: Trong các số 3; 5; 8; 9,10, 12, số nào thuộc tập hợp A = {x Î N| x ³ 5} và số nào thuộc tập hợp B = { x Î N| x £ 5}.

Exercise 1: Chọn đáp án đúng để điền vào chỗ trống (chú ý: ký hiệu “x” có nghĩa là không cần mạo từ)

1. We are looking for _______ place to spend ________ night.

            A. the/the                   B. a/the           C. a/a              D. the/a

2. Please turn off ________ lights when you leave ________ room.

            A. the/the                   B. a/a              C. the/a           D. a/the

3. We are looking for people with ________experience.

            A. the                          B. a                 C. an               D. x

4. Would you pass me ________ salt, please?

            A. a                             B. the              C. an               D. x

5. Can you show me ________way to ________station?

            A. the/the                   B. a/a              C. the/a           D. a/the

6. She has read ________interesting book.

            A. a                             B. an               C. the              D. x

7. You’ll get ________shock if you touch ________ live wire with that screwdriver.

            A. an/the                    B. x/the          C. a/a              D. an/the

8. Mr. Smith is ________ old customer and ________ honest man.

            A. An/the                   B. the/an        C. an/an          D. the/the

9. ________ youngest boy has just started going to ________ school.

            A. a/x                          B. x/the          C. an/x            D. the/x

10. Do you go to ________ prison to visit him?

            A. the                          B. a                 C. x                 D. an

11. ________eldest boy is at ________ college.

            A. a/the                      B. the/x          C. x/ a             D. an/x

12. Are you going away next week? No, ________ week after next.

            A. an                           B. a                 C. the              D. x

13. Would you like to hear ________ story about ________ English scientist?

            A. an/the                    B. the/the       C. a/the           D. a/ an

14. There’ll always be a conflict between ________ old and ________ young.

            A. the/the                   B. an/a            C. an/the        D. the/a

15. There was ________ collision at ________ corner.

            A. the/a                      B. an/the        C. a/the           D. the/the

16. My mother thinks that this is ________ expensive shop.

            A. the                          B. an               C. a                 D. x

17. Like many women, she loves ________ parties and ________gifts.

            A. the/ a                     B. a/the           C. a/a              D. x/x

18. She works seven days ________ week.

            A. a                             B. the              C. an               D. x

19. My mother goes to work in ________ morning.

            A. a                             B. x                 C. the              D. an

20. I am on night duty. When you go to ________ bed, I go to ________ work.

            A. a/x                          B. a/the           C. the/x          D. x/x

Exercise 2: Câu chuyện sau được chia thành các câu nhỏ, hãy đọc và điền mạo từ thích hợp “a/an/ the hoặc x (không cần mạo từ)” vào chỗ trống:

1. There was ________knock on ________door. I opened it and found ________small dark man in ________blue overcoat and _______woolen cap.

2. He said he was ________employee of ________gas company and had come to read ________meter.

3. But I had ________suspicion that he wasn't speaking ________truth because ________meter readers usually wear ________peaked caps.

4. However, I took him to ________ meter, which is in ________dark corner under ________ stairs.

5. I asked if he had ________ torch; he said he disliked torches and always read ________ meters by ________light of ________match.

6. I remarked that if there was ________leak in ________ gas pipe there might be ________ explosion while he was reading ________meter.

7.  He said, “As ________matter of ________fact, there was ________explosion in ________last house I visited; and Mr. Smith, ________owner of ________house, was burnt in ________face.”

8.  “Mr. Smith was holding ________lighted match at ________time of ________explosion.”

9.  To prevent ________possible repetition of this accident, I lent him ________torch.

10.  He switched on ________torch, read ________meter and wrote ________ reading down on ________back of ________envelope.

11.  I said in ________surprise that ________meter readers usually put ________readings down in ________book.

12.  He said that he had had ________book but that it had been burnt in ________fire in________ Mr. Smith's house.

13. By this time I had come to ________conclusion that he wasn't ________ genuine meter reader; and ________moment he left ________house I rang ________police.

Exercise 3: Điền mạo từ thích hợp “a/an/the hoặc x (không cần mạo từ)”” vào chỗ trống.

14. Are John and Mary ________cousins? ~

No, they aren't ________cousins; they are ________brother and ________sister.

15. ________fog was so thick that we couldn't see ________ side of ________road. We followed ________car in front of us and hoped that we were going ________right way.

16. I can't remember ________exact date of ________storm, but I know it was on ________Sunday because everybody was at ________church. On ________Monday ________post didn't come because ________roads were blocked by ________fallen

trees.

17. Peter thinks that this is quite ________ cheap restaurant.

18.       A: There's ________murder here. ~

B: Where's ________body?~

A: There isn't ________body. ~

B: Then how do you know there's been ________murder?

19. Number ________hundred and two, - ________house next door to us, is for sale.

It's quite ________nice house with ________big rooms ________back windows look out on ________park.

20. I don't know what ________price ________owners are asking. But Dry and Rot are ________agents. You could give them ________ring and make them ________offer.

21. ________postman's little boy says that he'd rather be ________dentist than ________doctor, because ________dentists don't get called out at ________night.

22.  Just as ________air hostess (there was only one on the plane) was handing me ________cup of ________coffee ________plane gave ________lurch and ________ coffee went all over ________person on ________other side of ________gangway.

23. There was ________collision between ________car and ________cyclist at ________ crossroads near ________my house early in ________morning.  

24. Professor Jones, ________man who discovered ________new drug that everyone is talking about, refused to give ________press conference.

25 Peter Piper, ________student in ________ professor's college, asked him why he refused to talk to ________press.

Exercise 1: Chọn đáp án đúng để điền vào chỗ trống (chú ý: ký hiệu “x” có nghĩa là không cần mạo từ)
1. We are looking for _______ place to spend ________ night.
            A. the/the                   B. a/the           C. a/a              D. the/a
2. Please turn off ________ lights when you leave ________ room.
            A. the/the                   B. a/a              C. the/a           D. a/the
3. We are looking for people with ________experience.
            A. the                          B. a                 C. an               D. x
4. Would you pass me ________ salt, please?
            A. a                             B. the              C. an               D. x
5. Can you show me ________way to ________station?
            A. the/the                   B. a/a              C. the/a           D. a/the
6. She has read ________interesting book.
            A. a                             B. an               C. the              D. x
7. You’ll get ________shock if you touch ________ live wire with that screwdriver.
            A. an/the                    B. x/the          C. a/a              D. an/the
8. Mr. Smith is ________ old customer and ________ honest man.
            A. An/the                   B. the/an        C. an/an          D. the/the
9. ________ youngest boy has just started going to ________ school.
            A. a/x                          B. x/the          C. an/x            D. the/x
10. Do you go to ________ prison to visit him?
            A. the                          B. a                 C. x                 D. an
11. ________eldest boy is at ________ college.
            A. a/the                      B. the/x          C. x/ a             D. an/x
12. Are you going away next week? No, ________ week after next.
            A. an                           B. a                 C. the              D. x
13. Would you like to hear ________ story about ________ English scientist?
            A. an/the                    B. the/the       C. a/the           D. a/ an
14. There’ll always be a conflict between ________ old and ________ young.
            A. the/the                   B. an/a            C. an/the        D. the/a
15. There was ________ collision at ________ corner.
            A. the/a                      B. an/the        C. a/the           D. the/the
16. My mother thinks that this is ________ expensive shop.
            A. the                          B. an               C. a                 D. x
17. Like many women, she loves ________ parties and ________gifts.
            A. the/ a                     B. a/the           C. a/a              D. x/x
18. She works seven days ________ week.
            A. a                             B. the              C. an               D. x
19. My mother goes to work in ________ morning.
            A. a                             B. x                 C. the              D. an
20. I am on night duty. When you go to ________ bed, I go to ________ work.
            A. a/x                          B. a/the           C. the/x          D. x/x