Mark the letter A, B, C, D on your answer sheet to show the underlined part that needs correction.

The amount of oxygen and nitrogen in the air almost always remain stable, but the amount of water vapor vary considerably.

A. vary       

B. almost always   

C. The amount of          

D. stable

Trong mặt phẳng tọa độ Oxyz, cho phương trình tổng quát của mặt phẳng (P): 2x - 6y - 8z+ 1 = 0. Một véc tơ pháp tuyến của mặt phẳng ( P) có tọa độ là

A. (-1;3;4)

B. (1;3;4)

C. (1;-3;-4)

D. (1;-3;4)

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

A. dramatic

B. entertain

C. employee

D. musician

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks.

       Why is it that many teenagers have the energy to play computer games until late at night but can't find the energy to get out of bed (42) ______ for school? According to a new report, today's generation of children are in danger of  getting  so (43) ______ sleep that they  are putting their  mental and physical health at (44) ______. Adults can easily survive on seven to eight hours' sleep a night, (45) ______ teenagers require nine or ten hours. According to medical experts, one in five youngsters (46) _______ anything between two and five hours' sleep a night less than their parents did at their age.

Điền vào số (45)

A. whereas

B. or

C. so

D. because

Please cut my hair ________ the style in this magazine.

A. the same long as

B. the same length like

C. the same length as

D. the same long like

Tom and Linda are talking about jobs they would like to choose.

- Tom: “I think working as a doctor is a challenging job.”

- Linda: “________.”

A. That’s exactly what I think

B. It’s a good idea

C. I’m sorry, but I agree with you

D. Not at all