Tập nghiệm của bất phương trình (x-3)(2x+6)\(\ge\)0 là:

A. (-3;3)

B. (\(-\infty\);-3)\(\cup\)(3;\(+\infty\))

C. [-3;3]

D. R\(-3;3)

Tập nghiệm của bất phương trình \(\left\{{}\begin{matrix}3x+1\ge2x+7\\4x+3>2x+19\end{matrix}\right.\)

A. \(\left\{6;9\right\}\)

B. [6;9)

C. (9; \(+\infty\))

D. [6;\(+\infty\))

Trong mặt phẳng tọa độ Oxy, cho hai vectơ \(\overrightarrow{a}=\left(x;x-1\right),\overrightarrow{b}=\left(x+2;x+1\right)\). Điều kiện của x để \(\overrightarrow{a}.\overrightarrow{b}< 3\)

A. -2<x<1

B. 0<x<1

C. x>-2

D. -2<x<3

(Giải thích giùm mình)

Tìm tham số m để BPT \(\left|x+2\right|-m+9\le0\) vô nghiệm

A. m>9

B. m<9

C. m\(\le\) 9

D. m=9

(Giải thích giùm mình)

Hãy viết câu hoàn chỉnh với những từ gợi ý
1. She / going / New York / next month
2. I / see / them / post office / this morning
3. He / not finish / work / until / yesterday
4. My brother / live / California / long time
5. Hurry up! Our friends / wait / us / school
6. It was not / last week / I / her letter

Hãy hòan tất câu thư hai để có nghĩa tương đương như câu thứ nhất
1. Remember to send me a postcard
-> Don't........................
2. That room is so small that we can't live in it
-> That room isn't.......................
3. May I borrow your bicycle?
-> Would you mind..............................................?
4. He doesn't like football so he doesn't go to see the football match
-> If................................
5. I am going to cash a check in order to buy the textbooks
-> I am going to....................................
6. I didn't meet her again until last year
-> It was not......................
7. He didn't study his lessons until his father came home
-> It was not............................
8. Mr. Brown is driving a van to the city
-> A van......................................
9. The lady is very friendly. She lives next door
-> The lady..............................
10. The teacher told him to repeat what he said
-> The teacher told him, "Please............................................."

Hãy điền vào những câu sau với quá khứ hoặc hiện tại phân từ của những động từ trong ngoặc

Hãy khoanh từ không đúng và sửa lại

Hãy chọn một từ đúng để điền vào những câu sau

1. Doctors and nurses are the people who look .........................patients

A. for B. on C. after D. at

2. I don't feel very ..............this morning.

A. good B, better C. well D. best

3. She passed the exam .............she studied very hard

A. so B. although C. if D. because

4. My sister is very good ............. English

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

5. He doesn't often play tennis as he ....................

A. is b. did C. does D. used to

6. I went fishing twice a week ......... I was in my village

A. since B. when C. for D. while

7. The traffic is very heavy............. I often go to school late

A, because B. although C. so D. and

8. I wish I ...........speak English fluently

A. could speak B. speak C. spoke D. would speak

9. He warned them.....................in the rough sea

A. not to swim B. not swim C. don't swim D. not swimming

10. She asked him, "Did you drive to see Mr. Pitt?"

A. She asked him did he drive to see Mr.Smith

B. She asked him if he drove to see Mr. Pitt

C. She asked him had he driven to see Mr. Pitt

D. She asked him if he had driven to see Mr. Pitt

Hãy điền vào chỗ trống với những từ thích hợp who, whom, which, what

1. I cannot hear..............you say

2. The manager ...............is working in that office is my friend's sister

3. The sea..............lies between France and England is the Channel

4. Do you remember ...............happened in the city last year?

5. The greater part of food.....................we eat comes from the farm

6. Can you see...............is written on the board?

7. Do you know .................bought her house?

8. The lady..............we met at the supermarket is a dentist