3 August 1998, the day on ………… my sister was born, is the first day I remember.

A. when     

B. which     

C. that         

D. it

Chứng minh định lý: "Hình thang có hai đường chéo bằng nhau là hình thang cân" qua bài toán sau: Cho hình thang ABCD (AB // CD) có AC = BD. Qua B kẻ đường thẳng song song với AC, cắt đường thẳng DC tại tại E. Chứng minh rằng:

a) ΔBDE là tam giác cân.

b) ΔACD = ΔBDC

c) Hình thang ABCD là hình thang cân.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29.

VIRTUAL DOCTORS

Clare Harrison rarely falls ill and hates going to the doctor’s when she does. So when she recently (25) _________ out in a painful rash down one side of her body she emailed her symptoms, (26) _______ also included a (27) _________ fever, to e-doc, the internet medical service. Two hours later she was diagnosed as having shingles (Herpes Zoster) by her online doctor, who prescribed a special cleansing solution for the rash and analgesics to help relieve the pain.

Health advice is now the second most popular topic that people search for on the internet, and online medical consultation is big business. Sites vary enormously in what they offer, with services ranging from the equivalent of a medical agony aunt to a live chat with a doctor via email. They are clearly (28) _________ a demand from people who are too busy or, in some cases, too embarrassed to discuss their medical (29) _________ with their GP.

Điền vào ô trống 29

A. harm 

B. story 

C. hardship 

D. complaint 

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

No educational medium better as means of spatial communication than the atlas. Atlases deal with such invaluable information as population distribution and density. One of the best, Pennycooke's World Atlas, has been widely accepted as a standard owing to the quality of its maps and photographs, which not only show various settlements but also portray them in a variety of scales. In fact, the very first map in the atlas is a cleverly designed population cartogram that projects the size of each country if geographical size were proportional to population. Following the proportional layout, a sequence of smaller maps shows the world’s population density, each country’s birth and death rates, population increase or decrease, industrialization, urbanization, gross national product in terms of per capita income, the quality of medical care, literacy, and language. To give readers a perspective on how their own country fits in with the global view, additional projections depict the world's patterns in nutrition, calorie and protein consumption, health care, number of physicians per unit of population, and life expectancy by region. Population density maps on a subcontinental scale, as well as political maps. Convey the diverse demographic phenomena of the world in a broad array of scales.

Which of the following is NOT mentioned in the passage?

A. calorie consumption            

B. currency exchange rates

C. a level of educations          

D. population decline

Cho các chất sau: axetilen, metanal, axit fomic, metyl fomat, glixerol, saccarozơ, metyl acrylat, vinyl axetat, triolein, fructozo, glucozo. Số chất trong dãy làm mất mầu dung dịch nước Brom là.

A. 9.

B. 7.

C. 6.

D. 8.

Để xác nhận trong phân tử chất hữu cơ có nguyên tố H ng­ười ta dùng phương pháp nào sau đây

A. Đốt cháy rồi cho sản phẩm qua P₂O₅

B. Đốt cháy rồi cho sản phẩm qua CuSO₄ khan

C. Đốt cháy thấy có hơi n­ước thoát ra.

D. Đốt cháy rồi cho sản phẩm cháy qua bình đựng H₂SO₄ đặc

Dung dịch axit photphoric có chứa các ion (không kể H⁺ và OH^- của nước)

A. H⁺, PO₄^3-

B. H⁺, H₂PO₄^-, PO₄^3-

C. H⁺, HPO₄^2-, PO₄^3-

D. H⁺, H₂PO₄^-, HPO₄^2-, PO₄^3-

Phân tích đa thức sau thành nhân tử: x2 + 5x + 4