1. They didn't look after the children properly.

=> ......................

2. Sally is quite keen _________ the idea.

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

3. Anita is fond ________ playing the piano.

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

4. We (have) ................ four tests so far this semester.

5. He suggested .....................(travel) around the towm by bike.

6. Can you________ how old is she?

A. think B. known C. guess D. point out

7. The girl is singing this song very well. What is the girl's name?

=> ..........................

8. The paintings that were stolen from the museum haven't been found yet.

=> The paintings........................

Nhân tiện có ai biết cách dùng until, after, before, as soon as không ạ? Xin cảm ơn.

11. Recycling programs have helped to solve some of the ............. problems. (environment)

12. These plants grow well in ............ soil by the river. (fertilizer)

13. The silence and ............ of the house made the children feel frightened. (empty)

14. Farmer use different kinds of ............ to enrich the soil. (fertilize)

15. Companies are encouraging people to buy more by ............. the prices oftheir products. (reduce)

16. The money should be more ........... spent on the recycling plan. (use)

1. Reduce means not buying products which are ..............(overpackage)

2. Linda is one of the ............. from Friends of the Earth. (represent)

3. The country's ............. resources include forests, coal and oil. (nature)

4. Waste paper can be ............. after being recycling. (use)

5. Share your ............ story with our readers! (recycle)

6. Air is a ............ of gases. (mix)

7. Attractive .............. can help to sell products. (package)

8. These products are ............. friendly. (environment)

9. This novel is not .............. of all his works. (represent)

10. The outbreak of the flu epidemic resulted in a sharp ............. in the number of tourists. (reduce)

1. Please arrive early. We want to be able to start the meeting on time. (Dùng in order (not) to hoặc so as (not) to)

=>..........

2. I/ go/ school/ early/ avoid/ traffic jam/ because/ I/ live/ far/ school. (Viết thành câu hoàn chỉnh)

=>..........

3. My sister (visit)........ Hoi An many times.

4. How do people learn languages? (Passive voice)

=>.........

5. They kept me waiting for half an hour.

=>.........

6. We can't wear jeans at work.

=>.........

7. Does your country export rice to Britain? (Viết lại câu sao cho nghĩa không đổi)

=> Is ..........

8. I was very delighted that I passed the final exams.

=> I was very delighted ..........

9. We find it difficult to understand this question.

=> This question ..........

10. She's very pleased to see her grandparents soon.

=> She's looking ..........

11. He is trying to study very hard so that he can get a schoolarship.

=> In order to ...........

12. Glass has been recycle in our country for a long time.

=> People ..........

Cho ∆ABC vuông tại A (AB < AC) có AH là đường cao.

a) Chứng minh: △HBA∼ △ABC

b) Trên tia đối của tia AB lấy điểm D sao cho AD = AB. Gọi M là trung điểm của AH. Chứng minh: HD.AC = BD.MC

c) Chứng minh:MC⊥DH

Làm ơn giúp mình với

Cho biểu thức A = \(\frac{\left(x-1\right)^2}{x^2-4x+3}\) . Tìm x để A < 1

Chiều rộng mảnh đất là:

26 : 4= 6,5 (m)

Diện tích mảnh đất là:

26 * 6,5 = 169 (m2)

Diện tích đất làm nhà là:

169: 100 * 62,5 = 105, 625 (m2)

Đáp số: tự ghi bạn nhé.

a)A=(3x^2+1)(x+1)>/0.vậy minA=0 khi và chỉ khi x=-1/3 và x=-1

b)B=(3x-2)(x-4)