Finish each of the following sentences in such a way that it means the same as the sentence printed before it

1. Mary said : "I'll phone you"

➜ Mary told ......................

2. Although he had a good salary, he was unhappy in his job

➜ In spite of .....................

3. We didn't go on holiday because we didn't have enough money

➜ If ................

4. Horror films terrify my little sister

➜ My little sister ...............

5. How much does that coat cost ?

➜ What ...................

6. Cinema didn't become an industry until 1915

➜ It was not until ..............

7. Denise didn't know the truth until we had told her

➜ It was not until .................

8. They didn't pay the bill until the electricity was cut off

➜ It was not until ............

9. They didn't buy the house until the bank had lent them the money

➜ It was not .............

10. I didn't sleep until midnight

➜ It was not until ..............

Cho hai mẫu giấy quỳ tím có tẩm dung dịch KI vào 2 bình chứa O₃ và O₂. Nêu hiện tượng xảy ra và viết phương trình phản ứng minh họa

Cho 9,2 gam hỗn hợp gồm nhôm và bạc vào dung dịch axit sunfuric đặc (dư) và đun nóng thì thu được 7,168 lít khí sunfurơ (đktc) duy nhất. Tính thành phần % khối lượng mỗi kim loại

WORD FORM :

1. (compete) __________ sports encourage children to work together as a team

2. (globe) _________ warning is a big problem that concerns many countries and their people

3. She always belived (passion) _______ in women's rights

4. She started to sing (profession) _________ after leaving college

5. The 32 (final) ________ played in ten stadiums in South Africa from 11 June to 11 July 2010

6. The Davis Cup is an important international tennis (champion) __________

7. The room was (attract) _________ arranged for the party

8. The students are (compete) ________, but they're also supportive of each other

9. They are looking for companies to sponsor this (sport) _________ event

10. A lot of (view) _________ complained that there was too much violence in that movie

Chứng minh các đẳng thức sau :

a) 1 - cos x/ sin x = sin x/ 1 + cos x

b) ( sin x + cos x - 1 )( sin x + cos x + 1) = 2sin x cos x

c) sin² x + 2cos x - 1/ 2 + cos x - cos² x = cos x/ 1 + cos x

d) cos² x - sin² x/ cot² x - tan²x = sin² x cos² x

e) 1 - cot⁴ x = 2/ sin² x - 1/ sin⁴x

Chứng minh các đẳng thức :

a) sin x cot x + cos x tan x = sin x + cos x

b) (1 + cos x )(sin² x - cos x + cos² x) = sin² x

c) (sin x + cos x)/ cos³ x = tan³ x + tan² x + tan x + 1

d) tan² x - sin² x = tan² x sin² x

e) cot² x - cos² x = cot² x cos²x

WORD FORM :

1. Researchers in this field have made some important new _______ (discover)

2. _______, his wife was killed in a car accident (tragic)

3. People of all ages find movie ________ (entertain)

4. The story I just finished had a very _______ ending (surprise)

5. Movies try to describe an idea or record an ________ about our culture (observe)

6. The _________ of the movies began early in the 20th century (popular)

7. One movie can ________ influences other movie (quick)

8. Some movie portray the situation ________ and realistically (accuracy)

9. Movies have _______ their awarences of different life-styles (broad)

10. I was really _______ by the end of the story (surprise)