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 blank 31.  

A. being                

B. having              

C. they have                              

D. they were    

Cho hàm số y = ax⁴ + bx² + c có đồ thị như hình vẽ bên.

Mệnh đề nào dưới đây đúng?

A. a > 0, b < 0, c > 0; 

B. a < 0, b > 0, c < 0; 

A. The more he explained, the angrier she got.                 

B. He explained more, the angrier she got.

C. He explained more, so she got angrier.                         

D. The more he explained, she got angrier.

A. The test was so easy that he finished it as expected.  

B. It’s possible for him to perform well on the test.

C. He didn’t find the test as difficult as he had thought.

D. He had hoped that the test was not too hard.

A. We will probably go camping this weekend.               

B. We will not go camping this weekend.

C. We may not go camping this weekend.                        

D. We must not go camping this weekend.

A. the

B. opportunities

C. with

D. at home

I look forward (A) to hearing (B) from you and (C) see good response (D) from your company.

A. to hearing

B. from

C. see

D. from your

Tính:  $\frac{x^6-y^6}{x^4-y^4-x^{3}y+x{y}^3}$.

Lack (A) of physical (B) exercise (C) cause tiredness and (D) poor health.

A. of

B. exercise

C. cause

D. poor health       

I have passed all of my exams. I’m on top of the world.

A. in a high place           

B. very happy                           

C. in a high status           

D. very busy

He dedicated his life ______ the world from famine and disease.

A. to freeing                              

B. free                                     

C. to free                         

D. freed

It’s most odd that ______ he feels, the more efficiently he works.

A. the most stressed                  

B. the more stressed                  

C. the more stress           

D. the most stress

Tập xác định của hàm số y = cotx là:

They decided to ______ their journey till the end of the month because of the epidemic.

A. take up                       

B. put off                        

C. turn round                             

D. go over

Xác định giá trị của x để số dư trong phép chia sau bằng 0:

(3x⁵ – x⁴ – 2x³ + x² + 4x + 5) : (x² – 2x + 2).

A. Shall                           

B. Must                                     

C. Could                         

D. Will

A. must be obeyed                    

B. can be obeyed            

C. can obey                     

D. must obey        

Tìm tất cả các giá trị thực của tham số m để phương trình x³ – 3mx + 2 = 0 có nghiệm duy nhất

A. m < 1; 

B. m ≤ 0; 

______ boys at that age are a bit shy, girls at that age are much more adult already.

A. Because                      

B. Before                        

C. As soon as                            

D. While     

Hurry up! It’s getting ______. It’s dangerous to drive then.

A. longer and longer                 

B. later and later             

C. darker and darker                 

D. sooner and sooner

Trong mặt phẳng tọa độ Oxy cho I(2; 1) và đường thẳng d: 2x + 3y + 4 = 0. Ảnh của d qua Q_{(I; 45°)} là:

About a year ago, he was elected president of a big company and he ______ a holiday since then.

A. doesn’t have               

B. didn’t have                           

C. hadn’t had                            

D. hasn’t had

The zoo provides a ______ range of activities to help visitors learn about the animals.

A. big                              

B. large                                     

C. wide                                      

D. short

Swimmers move through the water by using the arms, legs, and body in ______.

A. motion                        

B. danger                        

C. action                         

D. reality

A. romantic                     

B. romantically                         

C. romanticize                          

D. romance

Giải phương trình sin²x + sin²2x = 1.

Vinamilk has offered jobs ______ 27 members of Vietnam’s Women’s Football team.

A. to                                

B. into                                       

C. for                              

D. at

A. –2 ≤ m ≤ 0; 

B. 0 ≤ m ≤ 1; 

Social networking can be ______ if users try to post new updates every day.

A. thought-provoking     

B. time-consuming                   

C. long-term                              

D. long-lasting

The young and energetic Vietnamese athletes performed ______ and won a lot of gold medals.

A. regularly                              

B. excellently                            

C. automatically                        

D. publicly

Rút gọn biểu thức:

$P=\frac{x\sqrt{x}-1}{x-\sqrt{x}}-\frac{x\sqrt{x}+1}{x+\sqrt{x}}+\frac{x+1}{\sqrt{x}}$

Today, the total number of national Red Cross societies from all over the world has ______ to 190.

A. peaked                        

B. reached                       

C. climbed                      

D. mounted

I would ______ the book The Incredible Journey to anyone who likes animals.

A. recommend                

B. speak                          

C. advise                        

D. tell

d) Xác định vị trí của điểm C trên nửa đường tròn đường kính AB để đoạn thẳng MN có độ dài lớn nhất.

A. defendant         

B. defenceless                           

C. defend                        

D. defence

c) Chứng minh MN vuông góc với CO.

A. Well done!                 

B. Thanks, the same to you.     

C. Sorry to hear that.               

D. Congratulations!

A. No, you don’t.            

B. No, you can use it.               

C. Yes, it’s my pleasure.           

D. Yes, you do.