Bạn có thể giải thích rõ đề bài được không ?

\(a.\left(-57\right)\cdot11=\left(-57\right)\cdot\left(10+1\right)=\left(-57\right)\cdot10+\left(-57\right)=-570-57=-627\)

\(b.75\cdot\left(-21\right)=75\cdot\left(-10\cdot2-1\right)=75\cdot\left(-10\cdot2\right)-75=-1500-75=-1575\)

 a, -627

b, -1575

D

Viet Nam is a diverse country with 54 different ethnic groups, so Vietnamese have very rich cultures and characteristics, especially women. However, there are some common features.

Firstly, Vietnamese women are very hard-working. They live in a developing country, so they have to work hard to make ends meet. They play various roles in society: nurses, mothers, wives and workers. after work, they have to do housework, take care of their children. No matter how hard their lives are, they always do their work well.

Besides, they are extremely skillful. A Vietnamese wife always takes good care of the house and keeps it clean, she cooks daily meals, prepare everything carefully. She runs all errands at home. She nurtures and teaches her children diligently.

Today, it is normal for women to assert themselves by social work. They have proven that they can also make money, secure their own lives and take care of their husbands and children. For mothers who only stay at home to care for children, of course, the economy will not be guaranteed, even if the husband has a job and a stable salary.

In fact, there are many cases of conflicting couples only for money reasons. When a wife makes money with a reasonable amount of working time, it will obviously limit financial conflicts.

Have the opportunity to confirm the expertise

Today, not only men have a career, women also have their own dreams and need to improve their professional and professional skills. For them, pursuing social goals is as important as being a wife and being a mother.

When staying at home all day, busy with unnamed jobs, less likely to interact with people of the same level, or more knowledgeable, unknowingly, mothers will feel helpless and bored. Sometimes, loneliness makes them uncomfortable and unhappy with themselves. Often, mothers who have a professional career and have more friends of the same interest find life more meaningful, especially when they know the balance between the female role of the family and the society.

Moreover, working mothers also have the opportunity to learn more experiences, can bring the knowledge applied to family life and parenting.

Encourage equal division of labor in the family

When the mother goes to work, of course, all jobs in the family need to be shared fairly. Dad can forget the TV or newspapers to hand over vegetables and dinner. Baby can take care of watering plants. Thus, it is not unusual for anyone to feel that their son is washing dishes.

At this point, the mothers at home are much more disadvantaged because for reasons of staying at home all day, there is probably no need to help. It is this thought that creates the habit of dependence and that is the barrier, not only between spouses but also between parents and children.

Another advantage is that when boys grow up, they will look at their father's example to follow without thinking that the female should only worry about housework. Girls will follow the example of their mother, growing up with confidence that women can both have happy families and keep their jobs and positions in society.

21. B

22. C

23. B

24. D

25. C

26. A

27. D

28. C

29. C

30. D

31. B

32. C

33. A

34. B

35. A

36. D

37. A

38. D

39. D

40. C

41. B

42. A

43. B

44. A

45. C

46. D

47. D

48. B

49. B

50. B

Mk cũng ko chắc là có đúng hết ko nên bạn xem qua rồi ktra nghĩa của câu nha!

1.this passage talks about

A. using in the Internet B. the role of english on the internet

C. learning English D. services of the internet

2. the opposite of the word advantage in the passage is

A. unadvantage B. inalvantage C. disadvantage D. imadvantage

3. The word it the passage refers to

A. english B. the internet C. the servise D. a ;language

4. Which of the following is not true

A. internet is servise widely B. english is very necessay on the internet

C. We learn English by using the internet D. Using a language fluetly will not take you seceral years

5. the word commonly in the passage is colsest in meaning to

A. widely B. successfully C. necessarily D.normally

Đăng muộn thế bạn ơi

mn làm nhanh giúp mik nhé!!

tên giống mk:))

nhiều người tên Hà An mà

nhưng ko giống họ thôi

ukm

ok

ok

( viết thêm vì người ta bảo: " câu trả lời quá ngắn, hãy trả lời lại " )

21: New _______ about the COVID-19 will be updated on the Internet every minute.

A. inform                               B. information                       C. informed               D. informative

22: If our teacher_______ here now, he would help s with this difficult exercise.

A. were                                  B. would be                           C. is                            D. has been

23: I have been in this club since I _______ in this school.

A. learn                                  B. have learned                     C. learned                  D. have been learning

24: Canned food is not as healthy as fresh food, _______?

A. is it                                     B. isn’t it                                 C. doesn’t it               D. does it

25: We don’t allow you _______ in our house.

A. to smoke                           B. smoke                                C. smoked                 D. smoking

26: The examination will be held ________ June.

      A. in                                  B. on                                       C. at                            D. to

27: Ann: "Shall we eat out tonight?" - Kate:"______"

A. It is very kind of you.                                                     B. You are very welcome.

C. That’s a great idea.                                                          D. That sounds like fun.

28: It’s cold outside. ________ your coat.

A. Put down                          B. Put off                                C. Put on                    D. Put into

29: Nobody knows what the________ of the explosion was.

A. reaction                             B. reason                                C. cause                     D. source

30: Try to ________ the meaning of words rather than going straight for your dictionary.

A. expect                                B. think                                  C. guess                     D. look

31. Do all the students get used ___________ their summer vacation in the countryside?

A. to spend                            B. spend                                 C. to spending          D. spending

32. Her parents were________ happy that she won the first prize.

A. extremes                           B. extremely                          C.  extremeness        D. extreme

33. If I were you, I ________ much harder.

A. should work                    B. worked                              C. could work           D. must work

34. The washing machine was expensive, ___________ , they couldn’t afford to buy it.

A. however                            B. because                             C. but                                     D. therefore

35. Smoke, dirt and noise are kinds of pollutants ________ cause health problems.

A. which                                B. who                                    C. whose                    D. that

36. She didn’t hear the dog barking outside because she________ headphones.

A. is wearing                         B. wears                                 C. was wearing         D. wore

37. Khanh Hoa Province often experience temperatures ________ 29C and 36C in the summer.

A. in                                        B. between                             C. for                          D. of

38. I remember ________ to the zoo by my father when I was a child.

A. to take                               B. taking                                C. being taken           D. to be taken

39. Life in a small town is ________ than that in a big city.

A. little peaceful                   B. much more peaceful       C. peaceful                D. much peaceful

40. “You have read that article on the website, haven’t you?”._ - Helen:” ___________”

A. Not yet. Why?                                                                 B. Sure thanks

C. Yes, of course. I will                                                       D. Not at all. Go ahead.

1. We don’t have enough money, so we can’t buy that house.

A. If we had enough money, we could buy that house. B. We could buy that house if we have enough money.

C. If we had had enough money, we could buy that house. D. We could have bought that house if we had had enough money.

2.Water these plant or they will die

A.Unless you water these plants ,they will die B.Unless you watered these plants ,they will die

C. Unless you water these plants ,they won’t die D. If you water these plants ,they will die

3. Hurry up or we’ll be late for the correct

A. If we don’t hurry , we won’t be late for the concert B.If we didn’t hurry , we will be late for the concert

C. If we don’t hurry, we will be late for the concert D.Unless we don’t hurry, we will be late for the concert

4..I can’t do this test because it is very difficult

A.If this test were difficult,I could do it B. If this test weren’t difficult ,I could do it

C.If this test weren’t difficult,I couldn’t do it D.Unless this test were difficult, I couldn’t do it

5. Study harder or you won’t pass the exam.

A. Only if you study harder, you will fail the exam. B. Unless you study harder, you will pass the exam.

C. If you don’t study harder, you will fail the exam.D. If you don’t pass the exam, you will have to study harder.

6. Take action soon or the pollution will get much worse.

A. If you don’t take action soon, the pollution will get much worse.

B. Unless you don’t take action soon, the pollution will get much worse.

C. The pollution will get much worse if you didn’t take action soon.

D. Only if you take action soon, the pollution will get much worse.

7. The fire will go out if we don’t put more wood on.

A. If we don’t put more wood on, the fire won’t go out. B. Unless we put more wood on, the fire will go out.

C. The fire will go out, so we don’t put more wood on. D. Unless we put more wood on, the fire won’t go out.

8. They spent a lot of money on food and clothes.

A. A lot of money was spent on food and clothes. B. A lot of money were spent on food and clothes.

C. A lot of money on food and clothes were spent. D. A lot of money on food and clothes was spent.

9. People have used the Internet all over the world.

A. The Internet has used all over the world. B. The Internet was used all over the world.

C. The Internet has been used all over the world. D. The Internet has been using all over the world.

10. Our house is going to be rebuilt by a local firm.

A. We are going to rebuild our house. B. We are going to have our house to rebuild.

C. A local firm are going to rebuild our house. D. A local firm is going to rebuild our house.

1. We don’t have enough money, so we can’t buy that house.

A. If we had enough money, we could buy that house. B. We could buy that house if we have enough money.

C. If we had had enough money, we could buy that house. D. We could have bought that house if we had had enough money.

2.Water these plant or they will die

A.Unless you water these plants ,they will die B.Unless you watered these plants ,they will die

C. Unless you water these plants ,they won’t die D. If you water these plants ,they will die

3. Hurry up or we’ll be late for the correct

A. If we don’t hurry , we won’t be late for the concert B.If we didn’t hurry , we will be late for the concert

C. If we don’t hurry, we will be late for the concert D.Unless we don’t hurry, we will be late for the concert

4..I can’t do this test because it is very difficult

A.If this test were difficult,I could do it B. If this test weren’t difficult ,I could do it

C.If this test weren’t difficult,I couldn’t do it D.Unless this test were difficult, I couldn’t do it

5. Study harder or you won’t pass the exam.

A. Only if you study harder, you will fail the exam. B. Unless you study harder, you will pass the exam.

C. If you don’t study harder, you will fail the exam.D. If you don’t pass the exam, you will have to study harder.

6. Take action soon or the pollution will get much worse.

A. If you don’t take action soon, the pollution will get much worse.

B. Unless you don’t take action soon, the pollution will get much worse.

C. The pollution will get much worse if you didn’t take action soon.

D. Only if you take action soon, the pollution will get much worse.

7. The fire will go out if we don’t put more wood on.

A. If we don’t put more wood on, the fire won’t go out. B. Unless we put more wood on, the fire will go out.

C. The fire will go out, so we don’t put more wood on. D. Unless we put more wood on, the fire won’t go out.

8. They spent a lot of money on food and clothes.

A. A lot of money was spent on food and clothes. B. A lot of money were spent on food and clothes.

C. A lot of money on food and clothes were spent. D. A lot of money on food and clothes was spent.

9. People have used the Internet all over the world.

A. The Internet has used all over the world. B. The Internet was used all over the world.

C. The Internet has been used all over the world. D. The Internet has been using all over the world.

10. Our house is going to be rebuilt by a local firm.

A. We are going to rebuild our house. B. We are going to have our house to rebuild.

C. A local firm are going to rebuild our house. D. A local firm is going to rebuild our house.