Một phần năm số ngôi sao là:

A. 5 ngôi sao

B. 4 ngôi sao

C. 3 ngôi sao

D. 2 ngôi sao

The child can hardly understand what they are discussing, _______ ?

A. can he

B. can’t he

C. are they

D. aren’t they

Một số gồm ba chữ số có tận cùng là chữ số 7, nếu chuyển chữ số 7 đó lên đầu thì được một số mới mà khi chia cho số cũ thì được thương là 2 dư 21. Tìm số đó.

Tính chất nào sau đây không phải là tính chất của chất đa tinh thể

A. Có tính dị hướng

B. Đông đặc ở nhiệt độ xác định

C. Nóng chảy ở nhiệt độ xác định

D. Có tính đẳng hướng

Read the passage below and decide whether the statements are TRUE or FALSE?

I’m Brian. I belong to a middle class family. There are six members in my family. They are our parents, grandparents, I and my younger sister. Our grandfather is the head of the family. He enjoys a commanding position. His decision is final in family matters. Nobody can dare to go against him. Everybody respects him. He is the guardian of the family. He is a cool and considerate man. He is just and fair. His decision is never influenced by any other. He is a retired teacher. He helps us in our study. Our grandmother tells good stories.

My father is a police officer. He is a great disciplinarian. He is sincere and hardworking. He always goes to office in time. My mother is a simple housewife. She is a postgraduate in English. She is soft-natured and caring. She takes great care of us. She does not care for her comfort for us. She looks after our grandparents. She helps the poor and the needy. She is religious and God-fearing.

Our family has been known for discipline and values. We give great importance to values and morals in life. Since our early childhood, we are taught to respect the elders and love the children. We learnt the lesson of punctuality and honesty from our grandfather. It is due to the good education of our grandparents that we could excel both in sports and education. Since our childhood we have been put into the habit of rising early in the morning. This has a natural effect on our health and physical fitness.

Our family is like a heaven. There is peace, prosperity, love and care. The younger’s have regard and respect for the elders while the elders shower them with their love and affection. The instructions of the elders are followed with great respect. If a member has some problem the whole family is beside him. I am proud of my family.

Question: Brian’s family has six people.

A. True

B. False

I’m Andrea. I’m in class 4A. Every day, I get up at 6 o’clock. I wash my face and brush my teeth in 10 minutes. I get dressed at a quarter past six. Then I have breakfast with my family. I often go to school at 6:45, but today my father drives me to school at ten to seven a.m. Luckily I was not late.

Andrea is in grade 4. ___________

2/8 có tử số là 2

không đúng

9/12= 1/12+4/12 + 6/12 + 1/2

      = 1/12+1/3+1/4+1/6

Hiện tượng quan sát được khi cho mẩu magie vào ống nghiệm chứa axit HCl dư là:  

A. Mẩu Mg tan dần, không có bọt khí thoát ra

B. Mẩu Mg tan dần, có bọt khí thoát ra, dung dịch thu được không màu

C.  Mẩu Mg tan dần, có bọt khí thoát ra, dung dịch thu được có màu xanh lam

D.  Không xảy ra hiện tượng gì