PRONUNCIATION
1) A .studies B. leaves C. watches D. misses
2) A. history B. physics C. middle D. library
Giúp mk với cảm ơn các bạn nhiều
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DT
Đỗ Thanh Hải
CTVVIP
2 tháng 6 2021
Mark the letter to indicate the word whose underlined part differs from the others.
1. A. watches B. goes C. boxes D. misses
2. A. snack B. facility C. activity D. habit
3. A. passed B. realized C. wished D. touched
Mark the letter to indicate the word whose underlined part differs from the others in the position of primary stress.
4. A. ancient B. treasure C. historical D. structure
5. A. committee B. astounding C. picturesque D. contestant
Mark the letter to indicate the word whose underlined part that needs correction.
6. My mother said that she would go to Britain following month.
7. When he arrived, I talked on the phone with my best friend.
8. Ha Long Bay is one of the most beautiful natural wonder in the world.
9. Can you help me with my homework? – I wish I can but I can’t.
Mark the letter to indicate the correct answer.
10. …………...she felt tired, she had to finish her assignments.
A. Despite B. In spite C. Because D. Even if
11. You …………....better if you had taken this medicine.
A. will feel B. would feel C. felt D. would have felt
12. My family had a…………..tour to the USA.
A. two-days B. two-day C. day-two D. Second day
13. The boy………….. Eyes are brown is my cousin.
A. whose B. who C. whom D. that
14. The local government suggests…………..a road through the Nam Cat Tien National Park.
A. build B. to build C. building D. being built
15. In 1990, due to the change of the economic situation, many Dong Ho cooperatives had to…………...
A. close B. close in C. close down D. shut
16. There is no point. …………..to get higher mark if you don’t study harder.
A. try B. to try C. trying D. in trying
17. I think I prefer city life…………...country life.
A. to B. than C. of D. more than
18. Can you tell me what you…………...at 8 last night?
A. have done B. were doing C. did D. have been doing
19. We can’t depend…………..., he is a unreliable person.
A. to B. on C. of D. with
20. A friend of mine phoned…………...me to a party.
A. for invite B. to invite C. for inviting D. on inviting
21. Khoa’s professor had him…………...his thesis many times before allowing him to present it to the committee.
A. writing B. to written C. wrote D. write
22. A snake or a spider is the animal…………....she’d like to keep as a pet.
A. where B. what C. that D. when
23. Yuri Gagarin become the first person to eat and drink in…………...
A. weightless B. gravity C. specific gravity D. microgravity
24. You had a stomachache yesterday,………….. ?
A. didn’t you B. hadn’t you C. do you D. did you
25. Their parents are as strict as…………...
A. we do B. ours C. our D. we are
26. John F. Kennedy wouldn’t have died in 1963 if he …………...to Dallas.
A. didn’t go B. wouldn’t go C. hadn’t gone D. not go
27.. …………..the stove when you have finished cooking.
A. Put off B. Put out C. Put D. Put up with
28. The new friend looks very…………....
A. Beautifully B. amazing C. Beautiful D. hospitality
Mark the letter to indicate the most suitable response.
29. – How lovely your cats are! - …………..
A. Really? They are. B. Thank you, it is nice of you to say so. C. Can you say it again. D. I love them, too.
30. - Is it right if I use your computer, mom? - …………..
A. I don’t care B. I accept it. C. Sure, go ahead D. Oh, forget it
BD
1 tháng 4 2020
A. Choose the word ( A, B, C, or D) that best fits each of the blank spaces:
At school, we ( 1) _____________ many things. In Literature, we learn about books and write essays. In History, we study past and present (2) ____________ in Vietnam and around the world. In (3) ____________, we study different countries and their people. In Physics, we learn about (4) ____________things work. In the (5) _______________ class, we study English. We study many other things as well, such as Music, Sports and Art. We (6) ______________ all of our classes.
1. A. studies B. to study C. studying D. study
2. A. things B. events C. books D. films
3. A. Geography B. Physics C. Biology D. History
4. A. when B. what C. how D. where
5. A. Music B. Language C. Math D. Physics
6. A. love B. likes C. enjoys D. All are correct
AH
Akai Haruma
Giáo viên
14 tháng 7 2023
Lời giải:
a.
$\frac{a}{b}< \frac{c}{d}\Rightarrow \frac{a}{b}-\frac{c}{d}<0$
$\Rightarrow \frac{ad-bc}{bd}< 0$
$\Rightarrow ad-bc<0$ (do $bd>0$)
$\Rightarrow ad< bc$ (đpcm)
b.
$\frac{a}{b}-\frac{a+c}{b+d}=\frac{a(b+d)-b(a+c)}{b(b+d)}=\frac{ad-bc}{b(b+d)}<0$ do $ad-bc<0$ và $b(b+d)>0$
$\Rightarrow \frac{a}{b}< \frac{a+c}{b+d}$
--------
$\frac{a+c}{b+d}-\frac{c}{d}=\frac{d(a+c)-c(b+d)}{d(b+d)}=\frac{ad-bc}{d(b+d)}<0$ do $ad-bc<0$ và $d(b+d)>0$
$\Rightarrow \frac{a+c}{b+d}< \frac{c}{d}$
Ta có đpcm.
NT
6
LN
Cho a,b,c,d>O. A=a/a+b+c + b/b+c+d + c/c+d+a + d/ d+a+b. Tìm phần nguyên của A. Cảm ơn các bạn nhiều
1
3 tháng 2 2016
Ap Dụng tính chất của dãy tỉ ssoos bằng nau:
\(A=\frac{a}{a+b+c}+\frac{b}{b+c+d}+\frac{c}{c+d+a}+\frac{d}{d+a+b}\)
\(A=\frac{a+b+c}{3a+3b+3c+3d}\)
Tiepps theo chúng ta rút gọn
\(A=\frac{1}{3}\)
8 tháng 11 2021
Bài 2: ta thấy A và B ở vị trí trong cùng phía , A + B = 180 độ =>a//b(1)
Ta lại thấy B , C ở vị trí đồng vị , B=C=70 độ =>b//c(2)
Từ 1,2 =>a//b//c
1) A .studies B. leaves C. watches D. misses
2) A. history B. physics C. middle D. library
\(1.B\)
\(2.D\)
Nghĩ v ak. Sai thì thui