Có thể phân loại vải dựa trên cơ sở nào?

I've never really enjoyed going to the ballet or the opera; they're not really my _____.

A. piece of cake   

B. sweets and candy   

C. biscuit  

D. cup of tea

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 blanks.

Mobile phones emit microwave radio emissions. Researchers are questioning whether exposure to these radio waves might (33) _______ to brain cancer. So far, the data are not conclusive. The scientific evidence does not enable us to say with certainly that mobile phones are categorically (34) _______. On the other hand, current research has not yet proved clear adverse effect associated with the prolonged use of mobile phones.

Numerous studies are now going (35) _______ in various countries. Some of the results are contradictory but others have shown an association between mobile phone use and cancer. (36) _______, these studies are preliminary and the issue needs further, long-term investigation.

Until the scientific data is more definite, it is prudent for people to try not to use mobile phone for long periods of time. Don’t think that hands free phones are any safer either. At the moment, research is in fact showing the opposite and they may be just as dangerous. It is also thought that young people (37) _______ bodies are still growing may be at particular risk.

Điền vào ô trống 34

A. risky

B. unhealthy

C. secure

D. safe

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The composer Verdi has written the opera Aida to celebrate the opening of the Suez Canal, but the opera was not performed until 1871.

A. has written

B. to celebrate

C. opening of

D. was not performed

Trong các phát biểu sau, có bao nhiêu phát biểu đúng khi nói về vai trò của quá trình cố định nitơ phân tử bằng con đường sinh học đối với sự dinh dưỡng nitơ của thực vật?

I. Biến nitơ phân tử (N₂) sẵn có trong khí quyển ở dạng trơ thành dạng nitơ khoáng NH₃ (cây dễ dàng hấp thụ).

II. Xảy ra trong điều kiện bình thường ở hầu khắp mọi nơi trên Trái Đất.

III. Lượng nitơ bị mất hàng năm do cây lấy đi luôn được bù đắp lại đảm bảo nguồn cấp dinh dưỡng nitơ bình thường cho cây.

IV. Nhờ có enzim nitrôgenaza, vi sinh vật cố định nitơ có khả năng liên kết nitơ phân tử với hiđrô thành NH₃.

V. Cây hấp thụ trực tiếp nitơ vô cơ hoặc nitơ hữu cơ trong xác sinh vật.

A. 5

B. 2

C. 3

D. 4

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

“You should have finished the report by now,” Mr Huy told his secretary.

A. Mr Huy reminded his secretary of finishing the report on time. 

B. Mr Huy said that his secretary had not finished the report. 

C. Mr Huy scolded to his secretary for not having finished the report. 

D. Mr Huy reproached his secretary for not having finished the report.